denigrated your experience as a local official."

Buttigieg replied that Klobuchar had, in fact, denigrated his experience, and he noted that he had served in the military. He served as a lieutenant in the Navy Reserve and fought in Afghanistan.

"Let me tell you about my relationship to the First Amendment. It is part of the Constitution that I raised my right hand and swore to defend with my life. That is my experience, and it may not be the same as yours, but it counts, Senator. It counts," he said.

When Klobuchar argued that she was talking about his experience outside the military -- comparing her winning record in the Midwest with his losses in races for chairman of the Democratic National Committee and for Indiana state treasurer -- heamong them could make the most persuasive case that Trump should be removed from office at a time when the public is divided on impeachment.

Sanders called the President a "pathological liar" who is "running the most corrupt administration in the modern history of this country."

He said he would be making the case in the coming weeks "that we have a President who has sold out the working families of this country, who wants to cut Social Security, Medicare and Medicaid after he promised he would not do that."

The only candidate to make a counterargument was Yang, who argued his party should stop obsessing over impeachment and place a greater focus on the problems facing Americans.

"The more we act like Donald Trump is the cause of all our problems,