Yes they are. The prosecution of Hunter Biden started when Trump appointed a Republican prosecutor to "go after" Hunter Biden. Joe Biden could have stopped the investigation, like Trump did in New York, in shutting down Cy Vance Jr. and all Trump related investigations, but he didn't.
The White House is not commenting on the gun charges brought against Hunter Biden.
abcnews.go.com
House Republicans issued a subpoena Tuesday to a federal prosecutor involved in the criminal investigation into Hunter Biden, demanding answers for what they allege is Justice Department interference in the yearslong case into the president's son.
www.ctvnews.ca
The referrals, which accuse the president’s son and brother of lying about his involvement in their business dealings, carry no force of law but are the latest bid by Republicans to target the Biden family.
www.nytimes.com