Boater has listed five or six liberals that are on Fox, regularly, and have been for years.

You mean people who make occasional appearances. Fair enough.

But your use of “will be” suggests that conservative contributors don’t exist at MSNBC right now

Nicole Wallace, communications director for George W Bush hosts a program every day, Monday thru Friday in the afternoon. Joe Scarborough, who hosts a 4 hour daily program each morning, was a 3 term Republican Congressman from the conservative Florida District 1.

That is at least 5 hours every day , right now, hosted by a conservative, although both have been critical of Trump, as have other conservatives like George Will, Liz Cheney, Mike Pence, Nikki Haley, John Kelley, Lisa Murkowski, Bill Barr, John Bolton, Susan Collins, Mitt Romney, John Boehner, Paul Ryan, Jen Bush, Chris Christie, Christine Todd Whitman, Marc Sanford, Arnold Schwarzenegger, Ann Coulter, Carly Forina, Rupert Murdoch, and a host of others.

And they invite conservatives on in guest slots, as does Fox with liberals and CNN with both sides (occasionally).

Hope this helps.