Moody's downgrade of the U.S. sovereign credit rating has elicited mixed responses among Republicans in Congress, with some questioning the motive behind the change and others depicting it as a warning that lawmakers should heed as they wrestle with a sweeping tax and budget bill.

Days before Republicans unveiled their sweeping tax cut plan, the chairman of the powerful Ways and Means Committee had one last person to consult. He went to the White House, where he and President Donald Trump went over the legislation “line by line.