The Legislature makes the laws, The Supreme Court interprets the laws, the Executive branch enforces the laws. When the Executive branch fails to enforce the laws properly, or to use the law for political advantage, it is the DUTY of the Legislature to impeach the Executive. The problem with this country and our system is that, going back to FDR, the Executive branch has cultivated the image of President as king, so that the public is highly resistant to impeachment. Nixon should have been gone in a heartbeat. Instead he dragged it out. Reagan should have bit it during Iran/Contra. Instead, he made the country FEEL SORRY for him, as if he had some divine right to rule. Similarly, while Clinton should never have been involved in a civil suit while President, he should have stepped down when it became clear he'd lied under oath. The integrity of the Presidency has to be beyond question, and it is the DUTY of the legislature to constantly question it anyhow. That's how it's supposed to work.
Now how it really works is that the President, by definition a politician, is given this neat toy called the Justice Department, which he almost inevitably uses for political purposes, to help his cronies and hurt his enemies. And the legislature looks the other way.
I'm a Kennedy assassination researcher, and one of the most disturbing conclusions one gets from looking at the official record, is that the Justice Department itself was the orchestrator of the cover-up. The Justice Department is the muscle of the Presidency, and the second Kennedy was dead, the Justice Dept. under Katzenbach and the FBI under Hoover became concerned with one thing--pleasing the NEW President, Lyndon B. Johnson. It's not a coincidence that Johnson's appointment of the Warren Commission blocked Congress from investigating, and that when Congress finally did investigate, they found a probable conspiracy.
Here's a link to my new video discussing lies told to the Warren Commission about the medical evidence, and Arlen Specter's role in the cover-up:
<
http://www.noisivision.com/jfk.htm>The one on Specter is the vid on the bottom right.