AXIOS (Hans Nichols) - Trump's revenge spree stuns Senate Republicans
Senate Majority Leader John Thune — and most of the GOP conference — was reeling Tuesday from President Trump's snap endorsement of Ken Paxton in the Texas GOP Senate runoff. Why it matters: Thune (R-S.D.) called it Trump's "decision." But it's Thune's problem to pass Trump's agenda, with a trio of senators the president can no longer hurt. - Sen. Thom Tillis (R-N.C.) has been unbowed since announcing his retirement in July 2025 after clashes with Trump. - Sen. Bill Cassidy (R-La.) voted with Democrats Wednesday to advance an Iran war powers vote to debate. - Sen. John Cornyn (R-Texas) has a runoff May 26 but will enter it with Trump backing someone else. Adding to Thune's degree of difficulty: a president sick of the Senate…