Former top aide Jeff Mateer testified in the historic impeachment trial of Texas Attorney General Ken Paxton, providing insight into why Paxton was using his power in ways that are now at the center of the trial. Mateer believes an extramarital affair Paxton had with a donor’s employee was “relevant” to the accusations, and that it helped connect the dots about why Paxton was using his power in the ways he was. If convicted, Paxton will be removed as attorney general and could be barred from running for office again. The Texas Senate is expected to make a decision on the articles of impeachment in the coming days.