“Let me be clear to my Republican friends at home watching: If you vote for Harris in 2024, you are not a Democrat. Many conventions have featured a speaker from across the aisle—think Joe Lieberman’s backing of John McCain in 2008 or John Kasich’s support of Joe Biden four years ago—but the number of Republicans at this DNC is remarkable. The harder task is getting ordinary Republicans to vote for Harris—or at least to stay home and not vote for Trump.