You are joking, of course.
Right?
Seperate and equal by it's very structure forces oversight. The division of power is the underpinning of democracy. I can't believe you would sincerely question the existance of an oversight role of any of the branches of government over the other.
If you really aren't joking, start here for a general overview...
http://en.wikipedia.org/wiki/Federal_government_of_the_United_States#Legislative_branch
The Congress has the responsibility to monitor and influence aspects of the executive branch. Congressional oversight prevents waste and fraud, protects civil liberties and individual rights, ensures executive compliance with the law, gathers information for making laws and educating the public, and evaluates executive performance. It applies to cabinet departments, executive agencies, regulatory commissions, and the presidency. Congress's oversight function takes many forms:
Committee inquiries and hearings;
- Formal consultations with and reports from the President;
- Senate advice and consent for presidential nominations and for treaties;
- House impeachment proceedings and subsequent Senate trials;
- House and Senate proceedings under the 25th Amendment in the event that the President becomes disabled, or the office of the Vice President falls vacant;
- Informal meetings between legislators and executive officials;
- Congressional membership on governmental commissions;
- Studies by congressional committees and support agencies such as the
- Congressional Budget Office, and the Government Accountability Office, both of which are arms of Congress.
Also read:
http://en.wikipedia.org/wiki/Necessary-and-proper_clause
To make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this Constitution in the Government of the United States, or in any department or officer thereof.
And:
http://en.wikipedia.org/wiki/United_States_Bill_of_Rights
Fourth Amendment Protection from unreasonable search and seizure.
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.