Barack Obama is about to tell Bernie Sanders that the revolution stops now.
On Tuesday evening Mr Obama called Hillary Clinton to congratulate her on securing enough delegates to "clinch" the Democratic nomination.
He also called Bernie Sanders to thank him for his hard-fought campaign. At the Vermont senator's request, the two will have a meeting on Thursday to discuss "how to build on the extraordinary work he has done to engage millions of Democratic voters", in the words of a White House press release.
In other words, it's time to wrap things up and unite the party behind Mrs Clinton. The president is the leader of the Democratic Party, and it's his legacy on the line. Continued acrimony within the ranks will only complicate matters.
Now it's only a matter of time before Mr Obama formally endorses Mrs Clinton and hits the campaign trail to support her.
He's reportedly itching to enter the political fray one more time and take aim at Donald Trump, who he sees as disparaging the coalition of voters that propelled him to the presidency.
So when Mr Obama endorses Mrs Clinton, how much of a boost will it give his former secretary of state? And will it come in the right places?
Here's a look at where Mrs Clinton needs the most help - and what Mr Obama's endorsement could do for her.