DNC chair Tom Perez has previously made it clear that he’s not interested in having any Dem debates on Fox News:

Just to be clear, Fox News will not serve as a media partner for the 2020 Democratic primary debates. — Tom Perez (@TomPerez) March 6, 2019

Perez was also on Fox News recently and he asked Bill Hemmer to have a word with the network’s executives so it becomes a more attractive outlet for Dems who are running for president:

DNC chairman Tom Perez to Bill Hemmer on Fox News this morning: "I don't have faith in your leadership at Fox News at the senior levels." https://t.co/iNchUyE3NC — Jeremy Barr (@jeremymbarr) April 15, 2019

As for a certain candidate running for the Dem nomination, he decided to give Fox News a chance, and the viewers were certainly there:

Thank you for watching & for making last night the most watched town hall on any network so far. Even running from 6:30-7:30pm https://t.co/OM5QrgKXoM — Bret Baier (@BretBaier) April 16, 2019

It looks like one other Dem is willing to let down Tom Perez and go for it:

Amy Klobuchar to hold Fox News town hall https://t.co/dtxmbJoFC5 pic.twitter.com/Zi4SUDTI0q — New York Post (@nypost) April 17, 2019

Now they're lining up. Fox just announced an Amy Klobuchar town hall for early next month. Maybe Bernie proved it's a good idea to reach the largest cable news audience? — HowardKurtz (@HowardKurtz) April 17, 2019

It’s becoming a “thing” now!

Sounds like SOME Dems know where the viewers are.

CNN be like wtf guys? — Chrìstορhεr (@cdwillett66) April 17, 2019

They have seen that CNN is dead, nobody is watching CNN again — Jude Mat (@JusticeIsDead1) April 17, 2019

Aired commercial free, courtesy of Office Depot’s new line of throwable staplers. https://t.co/Ogegu36NUl — Darrick Johnson (@darrickjohnson) April 17, 2019

Ouch!