By Eric Zimmermann - 08/20/09 11:08 AM EDT
Ensign, who voted to impeach Clinton, said his decision was based not on Clinton's affair but on his dishonesty.
"You remember that famous day he lied to the American people, plus the fact I thought he suborned perjury. That's why I voted for the articles of impeachment."
Appearing before the Chamber of Commerce in the town of Fernley, Ensign began by again apologizing for his indiscretion.
"I think it would be inappropriate to start any other way than to say I'm sorry," Ensign said. "I've said I'm sorry. I can't say I'm sorry enough. I made a big mistake in my life and I apologize once again to all of you."
In June, Ensign admitted to a nine-month affair with campaign aide Cynthia Hampton.
It has since come to light that Ensign's parents paid Hampton and her husband $96,000 when they learned of the affair.
Ensign told the AP that he's still trying to make amends with his constituents for his actions.
"What we're trying to do is go around to people in the state of Nevada and tell them how sorry I am for what I did," said Ensign.