Sen. Mike Lee asks social media giants for even one example of blocking liberal content. They struggle.

Sen. Mike Lee again accused top executives of Google, Facebook and Twitter of bias against conservatives in how they block or moderate content — and then reveled when two of the three could not come up with, at his urging, any specific example of flagging or blocking a liberal group’s content.So Lee tweeted after a Senate Commerce Committee hearing on Wednesday, “Big Tech suppresses #ProLife groups all the time but can’t name one time they suppressed Planned Parenthood, N