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Trump’s ‘stability’ and ‘competence’ questioned by key GOP senator

03:17

President Trump was quick to offer U.S. support in response to the attack in Barcelona, but is coming under fire for a follow-up tweet citing a debunked anti-Muslim myth, as well as for his ongoing reaction to deadly violence in Charlottesville, Virginia. Republican Sen. Bob Corker is among those questioning Trump’s ability to lead. NBC White House correspondent Kristen Welker reports for TODAY.