[632brick]

The only example I could think of that sort of fits that bill: "National Union Party was a wartime coalition of Republicans, War Democrats, and border state Unconditional Unionists that supported the Lincoln Administration during the American Civil War. It held the 1864 National Union Convention that nominated Abraham Lincoln for president and Andrew Johnson for vice president in the 1864 United States presidential election." (wikipedia) Great success as an electoral pairing, not so much afterwards with Johnson's reconstruction policies resulting in all former Republicans leaving the National Union Party and an impeachment.