Rep. Ronny Jackson (R-TX) said he would “demand” that President Joe Biden take a test for performance-enhancing drugs before the debate on Thursday. On Sunday, Jackson told Fox News host Maria Bartiromo that he was sending a letter to the White House. “So tomorrow, I’m sending a letter to President Biden, to his physician, Dr. O’Connor, and I’m CCing his entire cabinet,” Jackson explained. “And it’s embarrassing that I have to do this.” Want more breaking political news? Click for the latest headlines at Raw Story. “But I’m going to be demanding on behalf of many millions of concerned American…