This article is more than 2 years old.

March 3, 2016 This article is more than 2 years old.

The White House on Thursday published a letter that Brent Brown, a Republican from Wisconsin, wrote to president Barack Obama in June.

Brown, who has voted Republican his entire life, wrote that he had been “very vocal” in his opposition to Obama—especially on healthcare.

That was before he got treatment for a serious autoimmune disease through the Affordable Care Act.

“I am so very sorry,” Brown writes. “Put simply to not take up too much of your time if you are in fact taking the time to read this: I would not be alive without access to care I received due to your law.”

Brown’s letter was released ahead of Obama’s appearance in Milwaukee today to recognize the city for signing up 89,000 people for health coverage through the ACA. The White House also published a more recent message from Brown. “Before the Affordable Care Act, I was unable to pay for an incredibly expensive drug that helps to stabilize my condition,” Brown wrote. Afterward, “I was finally able to receive the quality of care that had eluded me for years.”

Read Brown’s full letter to the president below: