[1andrew1]

I think the leaks show the lack of respect and authority that the US President commands. You can tighten things up as much as possible but ultimately, having respect for the President would reduce leaks. And, it's not just his inner circle that has a problem with POTUS; Trump's popularity is now down to 33%. And that's before taking his lengthy 17-day holiday.
Further more, we can see evidence of others sidelining him. Prominent Republicans ignored the president’s instructions to continue working on healthcare and instead turned to tax policy. “Trump has proven to be a relatively weak president. He hasn’t learned how to use the powers of the office,” says John Sides, a political scientist at George Washington University. “It’s difficult for other political actors to take him seriously.”
And those pesky Russians? Prime Minister Dimitri wrote on Facebook "The Trump administration has shown its total weakness by handing over executive power to Congress in the most humiliating way . . . The US establishment fully outwitted Trump; the president is not happy about the new sanctions, yet he could not but sign the bill.”
Mentioning Russians, talk that special counsel Robert Mueller has convened a grand jury to investigate alleged ties between Mr Trump’s 2016 campaign and the Russian government only sets the scene for more interesting times ahead.