"Sorry, she's a reporter," Bill Hemmer corrected the Trump campaign's Mercedes Schlapp, who had called Welker a "bit of an activist."
The anchor will fill the 3 p.m. slot once occupied by Smith before his abrupt departure from the network in October.
Andrew Napolitano acknowledged that, if he were in the House, he would vote to impeach the president.
"This is someone who said white supremacy is a hoax," Democratic National Committee Vice Chair Michael Blake said.
"The president just wants everything to be investigated,” the senior White House aide told Fox News' Bill Hemmer.
The Democratic National Committee chief said the network’s top managers "feel like they have to put the thumb on the scale.”
Hogan Gidley told Fox News that the president's former personal attorney is a liar, but dodged when repeatedly pressed on the truth of the allegation.
“Just to nail this down so we’re clear: Is that a yes or a no?"
He's sticking to his story that British intelligence wiretapped Trump Tower.
Spying on mosques? Really?