Steve Harvey Is Open to Supporting Mark Cuban For President

Steve Harvey is down with Mark Cuban running for Prez in 2020 ... well, somewhat down with it.

We got Steve, with Corey Gable at his side, leaving Via Alloro Friday in Bev Hills. Our photog asked about the Cuban's rumored run, and Steve is receptive.

Harvey's not a Trump fan, but doesn't think he should be a buzz kill for businessmen running for the highest office in the land.

BTW, Cuban opens up about a possible 2020 run -- and even says which party he'd run on -- on "OBJECTified," which airs Sunday at 8 PM ET and again at 11 PM ET on Fox News Channel.