He's playing to his base but I find he's not well informed on most issues and gets 100% of his talking points from Drudge headlines but trashes Drudge for being a shrill for the GOP.
Yesterday he thrashed Pelosi 90% of the time. She's not GOP.
Maybe it depends on how you define "liberal." He probably does have a lot of union and "yellow dog" Democrats listening to him, but it's hard to imagine ACLU liberals getting much pleasure out of Michael's show.