The first impeachment hearing Wednesday for Department of Homeland Security Secretary Alejandro Mayorkas devolved into a debate over whether President Joe Biden’s border policy amounted to high crimes and misdemeanors.

In a four-hour event that pitted Democratic lawmakers against the majority GOP, Democrats repeatedly questioned the legal grounds for the proceedings in the House Homeland Security Committee. They charged Republicans with waging a politically driven show during an election year over nothing more than differences in opinion on immigration issues.