President Trump's national security adviser, Lt. Gen. H.R. McMaster, might soon be back in the military, half a dozen defense and administration officials told CNN. Trump and McMaster's strained relationship was not helped this weekend by the president's public criticism of the three-star general. "General McMaster forgot to say that the results of the 2016 election were not impacted or changed by the Russians and that the only Collusion was between Russia and Crooked H, the DNC, and the Dems," Trump tweeted.