The subtweet: It’s how everyone from your neighbors’ kid to Justin Bieber chucks insults and criticism online without directly naming their target.Add Sen. Jon Cornyn (R-Texas) to the list of subtweeters.On Saturday morning, the Hill noted that Cornyn seemed to be lashing out at fellow Texas Republican — and presidential candidate — Sen. Ted Cruz with the tweet below. FYI: Cloture ends debate only. It does not confirm a nominee. Otherwise a subsequent vote on whether to confirm a nominee is meaningless.— JohnCornyn (@JohnCornyn) April 25, 2015 “FYI: Cloture ends debate only,” Cornyn wrote. “It does not confirm a nominee....