Senate Homeland Security and Governmental Affairs Committee Chairman Ron Johnson rebuked the panel’s ranking member, Sen. Gary Peters, for stalling a committee subpoena vote related to the Burisma investigation.

Johnson, a Wisconsin Republican who is spearheading the investigation into the Ukrainian energy firm Burisma Holdings, which is connected to former Vice President Joe Biden’s son Hunter Biden, wants to subpoena Andrii Telizhenko, a former low-level aide at the Ukrainian Embassy in Washington who is now a consultant in Kyiv.