WATCH: Free Beacon Investigative Reporter Talks Biden's Controversial Pick For African Union Ambassador

Washington Free Beacon senior investigative reporter Joe Simonson joined Fox News's Brian Kilmeade Thursday to discuss his report on President Joe Biden's pick to serve as ambassador to the African Union, who twice failed the Foreign Service Officer Test and said she "couldn’t even get through the English grammar section."

"This is part of a pattern from the White House of not exactly nominating the most qualified individuals," Simonson said, adding that Republicans including Sen. J.D. Vance (Ohio) are "pumping the brakes" and refusing to rubber-stamp the Biden administration's picks for crucial positions.

It took Stephanie Sanders Sullivan three times to pass the written exam required for most career diplomats, the Free Beacon reported this week. Sullivan, whom Biden nominated last November to serve as the chief envoy to the African continent, went on to have a long diplomatic career that included stints as deputy assistant secretary for African affairs and U.S. ambassador to Ghana.

It was in the latter post where Sullivan displayed the partisan behavior that has Senate Republicans questioning her fitness for the African Union post.