Democratic Rep. Tom O’Halleran of Arizona tested positive with a breakthrough case of COVID-19.

Democratic Rep. Tom O’Halleran of Arizona tested positive with a breakthrough case of COVID-19. 

“Today, after arriving back in Arizona for a district work week, I tested positive for COVID-19. I am fully vaccinated and boosted, and am only experiencing mild symptoms. I am grateful for the medical advances in vaccines and masks that have protected me,” wrote O'Halleran on Twitter.