The infection could be called the Helsinki Virus, but it probably started long before that. House Foreign Affairs Committee Chairman Michael McCaul is the latest to point out the problem in his party.   …In an interview with Puck News’s Julia Ioffe, Rep. Michael McCaul (R-Tex.) — none other than the GOP chairman of the House Foreign Affairs Committee — flat-out said that Russian propaganda had “infected a good chunk of my party’s base.” McCaul suggested conservative media was to blame. “There are some more nighttime entertainment shows that seem to spin, like, I see the Russian propaganda in some…