Senate Republicans are furious that Democrats Joe Manchin and Chuck Schumer announced a partisan tax and spending deal late Wednesday—only hours after the GOP had provided the votes for a giant semiconductor subsidy bill. The Republicans got played, all right, but the fault is their own.

Mr. Manchin is a Democratic politician who loves spending and has no particular problem with higher taxes. He’s also a deal-maker to his bones. Republicans thought that by supporting giant infrastructure and computer-chip bills, the West Virginian might stop a partisan spending bill. GOP Senators now look like tourists who paid $300 from LaGuardia for a taxi to their Manhattan hotel.