Barring some disaster, Hillary Clinton will win the US presidential election in November. That poses an interesting question for the US Left, because the defensive support for her offered by Sanders supporters and other progressives in the face of the Trump alternative can only be considered to be more than a short-term tactical ploy if her administration adopts progressive policies. Otherwise it is, as many have accused, continuation of politics as usual or Obama 2.0. This is, of course, at the heart of the negotiations between the Sanders camp and Clinton’s people at the DNC policy platform meetings, and it remains to be seen if the Clintonites will make good on their promises.

That brings up the perennial problem for political activists: how to turn a moment into a movement. US commentators are already using the phrase with regard to the Sanders primary run and the impact it will have on a future Clinton presidency. Some think that he has run his course, that status quo Democratic policies will prevail, and that the forces that his campaign galvanised will either go mainstream or dissipate into another pool of apathy and disenchantment. Others believe that to the contrary, the Sanders campaign has stirred new life into the American Left and that his campaign legacy will have an impact on how Clinton approaches the Oval Office.

It is a tough one to call. It is clear that Clinton needs to cater to Sander’s supporters in order to win the election. She cannot dismiss them before November 8 but could in theory do so afterwards, especially if the Democrats regain control of the Senate (they only need to win four seats) and make inroads into the Republican House majority (the Democrats would need a turnover of more than thirty seats to regain control of the lower chamber). The situation is made worse for progressives if Clinton wins by a landslide (anything over seven points) because she can point to a “mandate” that does not include them. That will be also be the case if political nihilists on the Left opt to “blow up the system” by voting for Trump or minor party candidates in large numbers. The latter will tighten the race unnecessarily (in Clinton’s eyes) and will, should she win, see her turn her back on the post-modern New Left wing of her party (I use the term “New Left” not in the sense of the 1960s Left but in the sense that post-modern progressives in the US are not in their majority affiliated with unions or other traditional organisational sources of Democratic electoral power). After all, she can say that they turned on her and she still won because the US political centre preferred her over Trump. She can feel justified in believing that she does not need the New Left to govern and therefore should not push policy initiatives at their behest.

Assuming a Clinton victory, the ideal situation for US progressives is twofold: most of Sanders’ supporters and others on the Left opt to vote for Clinton and she wins by a relatively close margin (say, between 3-5 points); and vote for Democratic candidates in key congressional districts knowing that a progressive presidential agenda needs congressional support in order to become law. That requires voter education (on the whys and hows of linking down-ballot choices to the presidential race and how executive-legislative relations can impact decisions with long-term consequences such as Supreme Court nominations) as well as mobilisation in favour of the progressive policies adopted by the DNC at the platform negotiations (and perhaps more).

In that preferred scenario, because Clinton will understand that she absolutely required a groundswell of New Left voters to win a close race, it will be harder to abandon them once victory is achieved. Even more so, it will be virtually impossible to renege on the progressive agenda if key wins by Democrats in Congressional races were owed to the participation of New Left voters.

So the Bernie “moment” in the primaries also has to become a dual proposition in the general election and post-election phases of the campaign if it is to become a movement. The New Left need to continue to mobilise in support of Clinton during the weeks leading up to November 8 and they need to continue to pressure her administration, both directly and through the elected Congressional candidates who needed their support to win, after she assumes the presidency and the 115th US Congress is convened in January 2017.

In other words, the transformation of the Sanders moment into a New Left movement requires one other “M:” momentum. That momentum has to be sustained through November and into the next administration and congressional term if the moment is to become a movement.

That is where some dark clouds arise on the Clinton electoral horizon, and they are not caused by Trump. In the purported interest of “balance” (regardless of the outright campaigning on his behalf by conservative media outlets), mainstream news organisations are delving into her emails while Secretary of State, into her relationship with Clinton Foundation donors while in office, into why she does not hold press conferences (which is patently self-serving on the news agencies part) and even into spurious conspiracy theories about her health. These investigative efforts go beyond reporting on official FBI investigations of Clinton’s use of a private email server during her tenure as SecState and in spite of the fact that none of her activities while in office have been linked to any policy decision or personal favour offered on her part. For reasons known only to Julian Assange and his comrades, Wikileaks has targeted her communications and those of the DNC, both independently as well as in cooperation with Russian-based hackers, while neglecting to do so with those of Trump and the RNC.

Any one of these lines of inquiry have the potential to divert attention and resources away from her policy agenda and could even derail her campaign if found to contain seriously negative substance (nothing of which has been found so far in spite of the best efforts of the Trump campaign and its media lackeys). So the onus is on Clinton to re-energise her support base in the face of these dishonest and scurrilous attacks and to re-focus on the policies that she will bring to the Oval Office and share with her Congressional colleagues. That is where the New Left vote is vitally important. Just as Trump has his core base in middle aged white working class lower educated people, Clinton has a core base in urban professionals. But both of them need to expand their appeal outside of those cores, and it is the New Left that Clinton needs to court most assiduously. That gives the New Left leverage on her and they need to know how to judiciously take advantage of it.

To be sure, the GOP is working to separate the New Left from Clinton. It may not get the attention that trying to divorce Trump from down-ballot GOP candidates has received from the RNC, but Republicans clearly want the Sanders crowd to alienate from Clinton whether or not they vote for another candidate like Jill Stein (Green). For the GOP, getting the New Left to stay at home rather than vote is just as important as getting them to adopt the nihilist approach of voting for spoilers.

This is made interesting by the fact that Libertarian presidential candidate Gary Johnson is polling at around 10-12 percent and has received financial backing from erstwhile big GOP donors, while Jill Stein is polling around 5 percent. Usually third party candidates barely receive 10 percent of the vote in a US general election, so the fact that these candidates could receive 15  percent or more changes the dynamics of the presidential race quite dramatically. That reinforces the need for Clinton to get out the New Left vote on her behalf in significant numbers, something that will allow her to build momentum in the run up to election day and which in turn means that she must accept the fact that the Bernie moment has become a progressive movement. This will annoy her backers on Wall Street and corporate America, but they also can see the dangers of having a populist demagogue with Tea Bagger tendencies occupying the White House. For them as well as many on the New Left, she is the lesser evil.

It will be interesting to see how things play out over the next 9 weeks. Two things are certain: every vote will count this time around and what is now a moment of opportunity can only be transformed into a sustainable movement if the New Left puts, however reluctantly or sceptically, its collective weight behind the Clinton campaign in order to build the momentum of progressive change beyond election day.

Let’s hope that I am not wishful thinking.