Why did Fetterman and McCormick’s campaigns team up to raise money?

I’m just an interested observer of politics (meaning I don’t have any education or experience in it) but why would the campaign of a Democrat and a Republican team up in this way? It won’t help Fetterman’s image in PA, for that I’m certain.

Strictly IMHO. They’re going to jointly twist the arms of donors who are specifically interested in what the Federal government can do for Pennsylvania.

It lets both of them brag about being “bipartisan”.

If Fetterman is planning to switch parties, this makes sense.