Ken Paxton wants you to join him on his high horse. Since announcing his run for the U.S. Senate seat held by four-term incumbent Senator John Cornyn last April, Paxton has held two roles: Texas Attorney General and firebrand candidate. Using the official trappings of the powerful AG’s office, Paxton has spent the past year broadcasting strong, overtly political messages to Texans. Among them: You should be scared, and you should be disgusted. …