The relationship between President Donald Trump and Senate Republicans neared a breaking point this week as he upended their efforts to speedily confirm one of his own nominees and said he would not sign the renewal of a key surveillance law unless they agree to new terms.

Trump's overnight social media post Wednesday that he was delaying Jay Clayton's nomination to become national intelligence director, just hours before the U.S. attorney's confirmation hearing, further strained relations between the Senate and White House that have been worsening for weeks.

Later that day, some Republican senators who have been hesitant to challenge the president directly on the Iran war were blunt in their criticism of his deal to end it.