All but five Republican senators backed former president Donald Trump on Tuesday in a key test vote ahead of his impeachment trial, signaling that the proceedings are likely to end with Trump’s acquittal on the charge that he incited the Jan. 6 Capitol riot.

The vote also demonstrated the continued sway Trump holds over GOP officeholders, even after his exit from the White House under a historic cloud caused by his refusal to concede the November election and his unprecedented efforts to challenge the result.