Senators will question the unconfirmed members of President Trump’s labor policy team on Thursday, with Democrats expected to vigorously interview the president’s picks to fill the open Republican seats on the National Labor Relations Board, the main federal labor law enforcement agency and the driving force behind most of the policy changes instituted under former President Barack Obama.

The nominees, lawyers Marvin Kaplan and William Emanuel, would give the board a Republican majority for the first time since President George W. Bush’s administration.