A top State Department official says he never saw any effort by U.S. officials to shield from scrutiny a Ukrainian natural gas company where Hunter Biden sat on the board.
George Kent is testifying Wednesday in the House impeachment inquiry into President Donald Trump.
Investigators are looking into allegations that Trump asked the new Ukrainian president to dig up dirt on the son of Joe Biden, a Democratic political rival.
READ MORE: What we learned from the impeachment transcripts
Hunter Biden sat on the board of the Ukrainian gas company called Burisma. Kent said he raised concerns in 2015 that his status could create the perception of a conflict of interest.
But Kent said he never saw any attempt to shield Burisma from scrutiny because of Biden's connection to the company.