Okay, President Trump, I'll be fair and stand in your corner for a moment.
Let's assume that the leaks are all "fake news" -- the New York Times, Washington Post, CNN, etc. are all in collusion to make up fake stories. IF they are "fabricated", then sure, something should be done to stem these outlandish stories. But from the sounds of it, the GOP hasn't outright denied the leaks. Instead, they push for "punishing the leakers."
Cornyn, Gowdy, etc. -- none of these hardcore GOP-ers have stated that the "leaks are patently false." So if we're going to go off of the whole "there is no collusion because there's no evidence" that Trumpsters seem to love, then I can answer back with "the leaks are legitimate because there's no evidence that they're false."
It's too huge a conspiracy to be even remotely plausible.
Sources of stories get corroborated by multiple news agencies so you'd need NYT, WaPo, CNN, Reuters et al to coordinate in conspiracy. That's at minimum dozens of people who are in on it and it seems likely that 1 of those people would expose such a massive conspiracy.
Or if the source is a conspiracy of many several bogus leakers they are SO GOOD at fake leaks that they outsmarted professional journalists from all those agencies time and time again, with perfect phoney documents and impeccably coordinated stories.
Neither the Washington Post or the NYT has mentioned that the trump administration tried to trick them with fake leaks at least once as well, but they actually went to verify them.
Therefore you are dishonest or dumb.