Joe Biden returned to the campaign trail on Thursday in a victory lap for his administration’s efforts to negotiate lower drug prices, as the White House announced it had struck deals with pharmaceutical groups to cap prices on 10 of the country’s most expensive medicines.

Thursday’s event in Maryland, just outside of Washington, DC, also marked the first time that Biden had shared the stage with Kamala Harris, his vice-president, since he announced last month that he was suspending his re-election bid and endorsing Harris as his successor.

“Folks, I have an incredible partner, the progress we have made, and she is going to make one hell of a president,” Biden said, vowing Harris would continue his efforts to cut the cost of prescription drugs for consumers if given another four years in the White House.