NEW YORK — On the morning of the first presidential debate, Donald Trump's campaign manager appeared on MSNBC's "Morning Joe" and was pushed again and again to explain why her candidate said that debate moderator Lester Holt is a Democrat when he is actually a registered Republican.

Kellyanne Conway declared that Holt was "a great selection for a moderator" and that this was a "terrible and irrelevant example" of something Trump had said, trying to pivot the conversation to attacking his Democratic rival, Hillary Clinton. Meanwhile, Mark Halperin of Bloomberg Politics cut Conway off at least half a dozen times, pushing her to explain why Trump said something factually inaccurate about the debate moderator.

Mika Brzezinski, "Morning Joe" co-host, confronted Conway about avoiding the question.

"I don't understand what that has to do with Mark's question," Brzezinski said as Conway complained about unfair media coverage. "We're asking why he lied about Lester Holt."

"He didn't lie," Conway said.

"Um, I think he did," Brzezinski said.

"Mika, a lie would mean that he knew the man's party registration," Conway said.

Conway — who has criticized the Clinton campaign for urging reporters to fact-check Trump — then launched into an attack on the reporters who cover her candidate.

"What I would ask you to do is to start looking at the Twitter feeds of quote 'objective' reporters, particularly our embeds," Conway said. "These are not profiles in courage, and this is not journalism. There are people who cover our campaign who actually just slander our candidate on Twitter. Ninety-two percent of one of them — I have them all on my desk, we've printed them all out — 92 percent of at least two of our embeds' tweets are negative toward Donald Trump. Why are they on our campaign plane? Why are they covering our campaign if they can't say, 'Hey, look at this crowd' ... So excuse the Trump campaign if we feel like we can't get a fair shake from certain people."

Watch these before Hillary Clinton and Donald Trump go head-to-head in the first general election debate Sept. 26. (Sarah Parnass/The Washington Post)