Republicans lost at least one U.S. Senate race in Georgia on Tuesday. And when the remaining ballots are counted, they may well lose both races. If so, Republicans will have blown what should have been a gimme shot for continued control of the U.S. Senate.

If the result pans out as described above, then the most significant parts of President Trump’s legacy — his tax reform, his judicial appointments, and his deregulatory actions — will soon be at the mercy of whatever House and Senate Democratic majorities wish to do. For this, Trump has no one to blame but himself.