President Joe Biden tested negative for COVID-19 Sunday for the second day in a row, allowing him to leave isolation at the White House and travel to Rehoboth Beach, Delaware.

“I’m feeling great,” Biden told reporters before leaving the White House and boarding Marine One.

Dr. Kevin O’Connor, the president’s physician, confirmed that Biden tested negative once again and "will safely return to public engagement and presidential travel."

The president also expressed optimism about the Inflation Reduction Act, which was being debated in the Senate on Sunday: "I think it’s gonna pass."

Biden, 79, initially tested positive for COVID-19 on July 21 and experienced mild symptoms. He isolated in the White House residence, where he continued to work. 

The president tested negative July 27 and began to participate in some in-person events. But three days later, he again tested positive and had to return to isolation.

While rare, rebound cases of COVID-19 have been linked to the oral treatment Paxlovid, which Biden took when he was first infected. 

The White House announced Friday that President Biden is set to travel to flood-ravaged Kentucky with First Lady Jill Biden on Monday, "where they will join Governor Andy Beshear and First Lady Britainy Beshear to visit families affected by the devastation from recent flooding and survey recovery efforts."

White House press secretary Karine Jean-Pierre said Friday that Biden would not travel to Kentucky if he is still testing positive for COVID-19.

"He will only travel if he tests negative," she said Friday.