In this Tuesday, Jan. 16, 2018 file photo, White House physician Dr. Ronny Jackson speaks to reporters during the daily press briefing in the Brady press briefing room at the White House in Washington. On Wednesday, March 28, 2018, President Donald Trump fired Veterans Affairs Secretary David Shulkin, and tweeted that Jackson is his nominee to replace Shulkin. (AP Photo/Manuel Balce Ceneta)
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President Donald Trump's selection of his White House doctor to run the massive Department of Veterans Affairs triggered concern Thursday among lawmakers and veterans groups about whether he has the experience to manage an agency paralyzed over Trump's push to expand private care.