On Monday in Cincinnati, Hillary Clinton gave a populist economic speech calling for higher taxes on rich people and tough regulations on Wall Street.

Yet Sen. Bernie Sanders, who pushed Clinton to the left on those very issues during the long primary season, was nowhere to be found. The presumptive Democratic nominee was flanked by Sen. Elizabeth Warren, who has possibly more leftist credibility on the issue of income inequality than anyone but Sanders. “I’m with her!” Warren cried as the crowd roared.

As Sanders refuses to fully back Clinton, weeks after she clinched the nomination, her campaign has had to launch its party unity strategy without him. At the national level, Clinton appeared with Warren, and will soon rally alongside President Obama and, later, Vice President Joe Biden. Both are incredibly popular among Democrats.

Meanwhile, Clinton’s local campaign teams in Florida and other states are arranging joint phone banks and cookouts to bring Sanders and Clinton supporters together to organize against Republican Donald Trump — even in the absence of Sanders’ endorsement of Clinton.