Trump’s support in the Republican caucus in the Senate today is rock solid
If the House Democrats draw up articles of impeachment (each one flimsier than the next—probably the Stephanopoulos interview would be an item), they will have a hard time getting 218 yes votes because some of the freshmen Democrats come from swing districts. If it did go to the Senate, Romney would probably vote yes, and maybe one or two other NeverTrumpers but it would be hard for them to get even to 50, let alone 67 (Manchin might vote no), and Mitch McConnell wouldn’t make things easy for them.