March 18, 2018
In this March 15, 2018, file photo, President Donald Trump talks with reporters during a meeting in the Oval Office of the White House in Washington. Trump is questioning the impartiality of Robert Mueller's investigation and says the probe is groundless. (Evan Vucci/AP)
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President Donald Trump on Sunday took out his frustrations over the intensifying Russia investigation by lashing out at special counsel Robert Mueller.