President Donald Trump has declared an all-out war on congressional power. And his allies on Capitol Hill aren’t doing much to fend off the invasion.

From firing a slate of inspectors general to changing citizenship qualifications to delaying a ban on the TikTok app, the president is running roughshod over Congress in his first week back in office. The effort culminated Monday night with a budget office memo freezing “all federal financial assistance” pending a review by administration political appointees.

The effort represents a frontal assault on the legislative branch’s core constitutional power to raise and spend federal funds — the “power of the purse” that has been zealously protected by generations of congressional leaders of both parties. A federal judge temporarily blocked the move Tuesday.

Yet many senior Republicans quickly fell in line, brushing off the implications of the freeze — with some saying they expected it to be narrowed and many others defending it as Trump simply making good on his electoral mandate.