U.S. Sen. Amy Klobuchar said Monday her husband, John Bessler, a law professor at the University of Baltimore, is hospitalized after testing positive for COVID-19, the respiratory disease tied to the novel coronavirus.

Klobuchar, D-Minnesota and a one-time U.S. presidential contender, said in a post Monday at Medium:

John started to feel sick when I was in Minnesota and he was in Washington D.C. and like so many others who have had the disease, he thought it was just a cold. Yet he immediately quarantined himself just in case and stopped going to his job teaching in Baltimore. He kept having a temperature and a bad, bad cough and when he started coughing up blood he got a test and a chest X-ray and they checked him into a hospital in Virginia because of a variety of things including very low oxygen levels which haven’t really improved. He now has pneumonia and is on oxygen but not a ventilator.