Peter Strzok, the counterintelligence agent who texted that “we’ll stop” then-candidate Donald Trump from becoming president, defended himself from allegations of bias during a closed-door interview with House investigators on Wednesday, characterizing his messages as private remarks exchanged in the course of an intimate relationship. He told investigators from the House Judiciary and Oversight Committees that he regretted the messages, to FBI lawyer Lisa Page, with whom he was having an affair. But lawmakers in the room said he repeatedly denied showing political favoritism to former secretary of State Hillary Clinton over Trump, at a time when the bureau was...