MIKE JOHNSONthe Speaker of the House of Representatives, was all but guaranteed to keep his job for another two years after winning Donald Trump’s endorsement on November 13. Yet that same day, Trump conspicuously withheld his endorsement in another leadership contest in Congress, and Senate Republicans chose John Thune as their next majority leader. The South Dakotan now has the unenviable task of managing a busy legislative schedule while trying to reconcile the demands of his own caucus, a restive lower chamber and an emboldened and volatile president.