Trump made the remark at a White House event welcoming Danny Burch, an oil engineer who Trump said last month was reunited with his family after 18 months in captivity in Yemen.
Trump has urged the Fed to aggressively cut rates to spur economic growth. Critics question the wisdom of Trump's action because any rate reductions following the president's urging might be seen as undercutting the Fed's independence.
Trump bristled at criticism of his administration's handling of the Puerto Rico disaster as Hurricane Florence approached the coast of North Carolina and began to unleash fierce rains that forecasters warned would cause catastrophic flooding across a wide swath of the US Southeast.
Trump wore a mask as he sat in the rear passenger seat of a black Chevrolet Suburban minutes after tweeting a video promising a "little surprise visit" to the crowd.
Trump told Fox News on Thursday morning that "it's a disgrace" the way his nominees have been treated, including Jackson.
Trump had mentioned his intention of building a "space force" earlier this year. In December, he signed a directive for the US National Aeronautics and Space Administration to return astronauts to the moon before an eventual mission to Mars.
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Trump arrived in Beijing on Wednesday on a three-day state visit to China.
Trump campaign raises 210 mln USD in August, falling short of Biden - World - Chinadaily.com.cn
Trump's criticism of the Fed has been constant and harsh. Presidents sometimes criticize the Fed's monetary policy, but it was always done quietly in the past. Trump's public comments are unusual.
Trump's tariffs on steel and aluminum imports will take effect in 15 days, with Canada and Mexico indefinitely exempted from the duties, according to people outside the White House who were briefed on the plans Thursday. The people spoke on condition of anonymity ahead of the president's signing of the orders.