In Tuesday night’s Pennsylvania primary most attention was focused on Republicans running for Senate and Governor, but something very important also happened on the Democrat side.

Progressive John Fetterman (D-PA) easily defeated his more moderate opponent Conor Lamb (D-PA), and in the PA 12 House race, Summer Lee (D-PA), a Squad-style progressive won the nomination for the open seat. These were two more clicks of a ratchet tightening the grip of the far left over the Party of Jefferson and Jackson.

It is hard to imagine that a party which just voted almost en masse for abortion until birth and which treats the Southern Border like the lightning lane at a Disney ride could go much farther left—but here is why it likely will.

It’s not just a matter of primary victories in strong blue districts. It is also the fact that if anything like a red wave happens in November, the losing Democrats in swing districts will almost by definition be moderates. This will bestow enormous power to the progressives in the Democratic caucus.