Ronny Lynn Jackson (born May 4, 1967) is an American physician, politician, and former United States Navy rear admiral, retroactively retired in the grade of captain. He is the U.S. representative for Texas's 13th congressional district.Jackson joined the White House Medical Unit in the mid-2000s under George W. Bush, and served as Physician to the President from 2013 to 2018 under Barack Obama and Donald Trump.In March 2018, Trump nominated Jackson to be United States secretary of veterans affairs to succeed David Shulkin, but Jackson withdrew the following month amid allegations of misconduct and mismanagement during his service in the White House. On February 2, 2019, Trump appointed Jackson Assistant to the President and Chief Medical Advisor, a new position in the Executive Office.Jackson retired from the Navy as a rear admiral (lower half) on December 1, 2019. On December 9, he filed to run for Congress in Texas's 13th congressional district. After placing second in the Republican primary, he won a runoff for the nomination and the November 3, 2020, general election. In 2021, an investigation by the Defense Department inspector general found that Jackson had engaged in various inappropriate behaviors as an admiral; the following year, the Navy retroactively demoted him to the rank of captain.