It's not a ha ha airline peanuts joke, it's a flippant aside. Like Palin, Trump often incoherently claws at saying zingers. That's what this is. His people have told him to repeatedly talk about Hillary's emails, because that's how he gained 4-5 points in the last month, so you could ask him who he was cheering for in the olympics and he'd say "I'm cheering... For making America great again by finding Hillary's 30,000 deleted emails".
Trump's positions on foreign politics are troubling to the point of disqualification, and allegations of foreign funding or ties should probably be investigated.
There is absolutely zero scenario on earth that ends with a major political party's candidate being indicted on treason charges--themselves extremely rarely used even in clear-cut collaboration of high-level employees with foreign governments. People calling for Trump to be strung up on treason charges are hyperventilating chicken little babies, probably upset because Bernie didn't time travel back in time to drop out earlier and politer or whatever other sky is falling refrain we're supposed to be freaking about today.
One can sharply oppose Trump--even as reckless or evil--and be upset with both how he says and how the public responds--without mythologizing him as Hitler's Cousin Voldemort. The same was true of nutcases trying to impeach Bush over Florida 2000 or Iraq or Diebold Ohio 2004 or whatever it was on any given day