Because Trump is senile and/or insane he is a fatal flaw in the U.S. govt. system that could allow escalation into war with Russia.  America needs One policy guided by a leader who has vision; instead of a narcissist whose obsession is humiliating and blaming everyone else for his own incompetence.
btw:  this thing about foreign 'meddling' in elections is over-blown.  All countries  including the U.S. do it.  In fact the U.S. is the leader in regime change by: sending millions of dollars to an opposition or just simply having the current leader assassinated.