Based on this evidence, what can be determined about the main idea of the informational text on Watergate?

Facing certain impeachment and removal from office, Nixon announced his decision to resign in a national televised address on the evening of August 8, 1974.

The main idea is that presidents have too much power.

The main idea is that presidents cannot be trusted.

The main idea is that presidents are not above the law.

The main idea is that Nixon was a poor leader.