Kamala Harris pounded Joe Biden with some serious body blows at that debate this past week. The U.S. senator and former California attorney general caught the former senator and former vice president flat footed when she questioned him about his senatorial relationships with avowed segregationists.

Oh, my. Then came the initial response. Harris now is on the front rank of Democratic challengers to Donald Trump. Her fans think better of her, if that’s possible. Biden’s fans initially were somewhat dismayed.

Now, though, the senator is getting a bit of push back, some resistance from those who think she might have let her ambition get the better of her. She shouldn’t have gone low with that attack against the ex-VP, some are saying.

Let’s play this out for a moment.

Suppose Biden remains the favorite among Democrats. Suppose, too, he gets the party’s presidential nomination in the summer of 2020. Who would he choose as his running mate. One Biden anonymous supporter said, “That sh** ain’t happening.”

Really? Let’s see. George H.W. Bush called Ronald Reagan’s fiscal policy “voodoo economics” when the two of them ran for the Republican nomination in 1980. Reagan then selected Bush to run with him; they served as a team for two terms and Bush got elected president in 1988.

Oh, then we had Biden running against Barack Obama in 2008. They fought hard for as long as Biden was in the hunt. Then the Delaware U.S. senator dropped out. Democrats nominated Sen. Obama — who then chose Biden to run with him. You know the rest of it.

Moral of the story? If Biden gets nominated, do not count out Sen. Kamala Harris as a potential running mate.