Gowdy was repeatedly interrupted through the rest of his questions, while he and Strzok got into a heated exchange.
Meanwhile, the House broke questioning to hold a 5-minute long vote to table a motion made by Rep. Eric Swalwell (D-CA) to subpoena former Trump aide Steve Bannon over his refusal to answer lawmakers' questions, similar to threats Strzok received during Thursday's hearing.
"My presumption [was] based on that terrible, disgusting behavior that the American population would not elect somebody demonstrating that behavior to be president of the United States", Strzok explained.
"I will not, based on direction of the FBI. answer that question, because it goes to matters which are related to the ongoing investigations being undertaken by the special counsel's office", Strzok replied, at a joint hearing of the Judiciary and Oversight committees. So, I take great offense, and I take great disagreement to your assertion of what that was or wasn't.
You need to understand that was written late at night, off the cuff, and it was in response to a series of events that included then-candidate Trump insulting the immigrant family of a fallen war hero, and my presumption based on that terrible, disgusting behavior that the American population would not elect someone demonstrating that behavior to be president of the United States.
"Of course I do", said Peter Strzok.
Rep. Trey Gowdy of SC says Strzok in his mind had Clinton "winning the White House" before he finished her investigation but had Trump "impeached" before he began working on the probe of his campaign ties to Russian Federation.
Strzok was removed from Mueller's team when media outlets obtained and published his text messages with Page.
But that's unlikely to be the focus of Thursday's hearing. In addition, it's a stretch to say that merely providing the number of witnesses Strzok interviewed when the FBI was still running the Russian Federation investigation in any way compromises the Mueller investigation. We've been flooded with hate-Trump messages.
"My wife, Julia and I, we have a 15-year-old daughter", Connolly continued, reading words from former House Oversight Chairman Jason Chaffetz, who stepped down from Congress last year.
"But that is, thus far, what we have found".
Immediately after the opening statements, Trey Gowdy, House Oversight Committee Chairman, asked Strzok how many people he interviewed during the first eight days of the FBI's Russian Federation investigation (between July 31 and August 8, 2016).
Strzok again stated he could not answer and Goodlatte said the Committee would consider a contempt citation. But Cummings asked: "Is there a rule for that Mr. Chairman?"
Trump has regularly taken to Twitter to blast Strzok and Page.
"The special counsel has now obtained five guilty pleas and indicted 18 others, including some of President Trump's closest advisers - referencing posters that included retired Lt. Gen. Michael Flynn who resigned and pleaded guilty to lying to the Federal Bureau of Investigation".
"Political belief does not equate to bias and we always have to go to the evidence", he said.
Although the charges are unrelated to Mr Manafort's work for candidate Trump, Mr Mueller's team is vigorously pursuing the case - perhaps in the hope of eventually gaining the long-time Washington insider's co-operation in his ongoing investigation.