Which part of the U.S. Constitution grants the executive branch power to hide things from the legislative?

Question

Need specifics please.

Answer 1

It's called separation of powers, 3 separate branches.

Answer 2

"In the United States government, executive privilege is the power (reserve power) claimed by the President of the United States and other members of the executive branch to resist certain search warrants and other interventions by the legislative and judicial branches of government. The concept of executive privilege is not mentioned explicitly in the United States Constitution, but the Supreme Court of the United States ruled it to be an element of the separation of powers doctrine, and/or derived from the supremacy of executive branch in its own area of Constitutional activity."

You can read the rest at: