Scott Walker is the GOP presidential frontrunner among Silicon Valley conservatives, if an informal straw poll is indicative of anything. I conducted it myself at the meeting of the Conservative Forum of Silicon Valley, which had invited me to speak on Tuesday night. From the stage, I read a list of 13 candidates and asked members of the audience of about 300 to pick their preferred contender. Walker was the clear winner, with Ted Cruz finishing second, Ben Carson in third, and Marco Rubio in fourth. The rest of the field earned just a smattering of support. That includes Carly Fiorina, who has spent some time in the area.