House Republicans have begun mapping aggressive probes of the Biden administration if they win back the majority — including inquiries into the origins of COVID, a leak of IRS data about billionaires, and accusations the NSA spied on Tucker Carlson.

Why it matters: The plans, obtained exclusively by Axios, show House Republican Leader Kevin McCarthy would make muscular use of majority powers for the last two years of President Biden’s term if, as expected, the GOP wins the majority in next year’s midterms.

McCarthy plans to send a spate of “preservation notices” to departments throughout Biden’s Cabinet, ordering them to retain documents that might be needed for future GOP oversight hearings.