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MORRISTOWN, N.J. — Former New Jersey Gov. Chris Christie is checking himself into a hospital Saturday after revealing he tested positive for COVID-19, he said in a tweet.

The governor cited a history of asthma for checking into Morristown Medical Center despite saying he was “feeling good.”

Christie assisted President Donald Trump with debate preparations earlier this week.

Trump is being treated for COVID-19 at Walter Reed Hospital after announcing early Friday that he and first lady Melania had tested positive.

“I just received word that I am positive for COVID-19. I want to thank all of my friends and colleagues who have reached out to ask how I was feeling in the last day or two. I will be receiving medical attention today and will keep the necessary folks apprised of my condition,” Christie tweeted Saturday morning.

Current New Jersey Gov. Phil Murphy sent well wishes in a statement.

“Tammy and I continue to keep Governor Christie in our thoughts and prayers,” he said. “We all know he is a fighter and wish him a full and speedy recovery.”