Tonight Rick Santorum will be on Greta Van Sustern’s show on FoxNews. Donald Trump will also be on the show. Do the math.

Santorum world official line is that there are "two major announcements" coming tonight on Fox. Top Rs, tho, tell me he's quitting+endorsing

— Robert Costa (@costareports) February 3, 2016

What I know: Santorum advisers and Trump advisers are very friendly. Santorum has grown friendly with Trump. Both will appear on Greta.

— Robert Costa (@costareports) February 3, 2016

If it happens, this is too bad. I’ve never been a Rick Santorum fan but I’ve always respected his passion for his beliefs. Hopefully, I am reading too much into the tea leaves here. But if he endorses Trump it will mean that he has effectively jettisoned the social conservatism that has been his raison d’être in order for whatever pottage Donald Trump provides.