The White House hosted a somewhat unexpected visitor on Monday: billionaire entrepreneur Mark Cuban.Cuban’s presence wasn’t a total surprise. Outlets reported earlier in the day that he was one of many healthcare executives who’d be at the White House for President Donald Trump‘s announcement regarding TrumpRx, the federal government’s website aimed at lowering prescription drug prices. Cuban’s Cost Plus Drugs, a direct-to-consumer marketplace for generic prescriptions, was one of three drug companies joining the TrumpRx venture in hopes of lowering costs for American households.“I’ve been the biggest proponent of TrumpRx.com, and the reason for that is Republicans want cheaper drugs. Independents want cheaper drugs. Democrats want cheaper drugs,” he said onstage at the South Court Auditorium after being introduced by the president. “Together, I think we’re going to do something special.

Following Monday’s event, Cuban told the Washington Examiner that he and Trump had been discussing for months some type of partnership between Cost Plus and the federal effort.

“We have what’s called programming interfaces … that we make available to everybody, and it was just a natural match for [us] just to work with them — to get as many of our drugs as they wanted to carry,” he explained.