Enough. The political insiders in Washington are deliberately changing the rules. Presidential nominees do not endorse in their own party's primaries. When people posing as reporters or pundits say Trump is not endorsing McCain or Ryan or Ayotte, they are misleading the public.
When you read or hear people saying this from Washington, ask yourself why they are not demanding Missus Clinton to back someone in the primary to pick Charlie Rangel's successor.
But you are smart enough to figure that out yourself.