Joe Biden (above)

https://www.vox.com/2020/8/20/21377041/joe-biden-gun-violence-plan-dnc-democratic-convention

Source: the FBI.

https://www.fbi.gov/file-repository/nics_firearm_checks_-_month_year.pdf/view

FBI ran 4.3 million gun background checks in January.

A single month high.

Gun purchase records have been kept by the FBI since 1998.

https://americanmilitarynews.com/2021/02/fbi-ran-4-3-million-gun-background-checks-in-january-breaking-all-time-single-month-record