Trump’s Tax Bill, Tariffs Fuel Lobby Boom as K Street Cashes In

The fast-moving agenda of President Donald Trump and congressional Republicans is fueling record-busting business for firms with ties to the White House, as corporate America, elite colleges, and lobbying groups wage high-stakes influence campaigns.

Ballard Partners, a firm with connections across the administration, disclosed hauling in $34.6 million in the top half of the year in fees, a new record and nearly 300% increase from the same period last year. The money came from such clients as Harvard, Palantir Technologies Inc., and TikTok. Second quarter disclosures were due at the end of Monday.

Trump’s tariffs, the big new ...