Chair Comer explained:

This is an investigation of JOE BIDEN… We will pursue all avenues that have long been ignored. Committee Republicans have uncovered evidence of federal crimes committed by and to the benefit of members of the President’s family. These include:
Conspiracy to Defraud the United States
Wire Fraud
Conspiracy to Commit Wire Fraud
Violations of the Foreign Agents Registrations Act
Violations of the Foreign Corrupt Practices Act
Violations of the Human Trafficking Victims Protection Act
Tax Evasion
Money Laundering
Conspiracy to Commit Money Laundering

… [we] will evaluate the status of Joe Biden’s relationship with his family’s foreign partners and whether he is a president who is compromised or swayed by foreign dollars or influence.
That’s a lot of crimes! If they can arrest President Trump, then they can certainly arrest the members of the Biden crime family.