McCain camp revives 3 a.m. ad

Watch McCain's new 3 a.m. ad.

(CNN) –The 3 a.m. ad is back.

John McCain's campaign is reviving the most famous political commercial of the Democratic primary cycle, launching a new 30-second spot Tuesday that uses footage from Hillary Clinton's original ad and declares "Hillary's right."

Watch: McCain camp revives 3 a.m. ad

The ad, set to run in key battleground states and specifically in Denver this week, also goes a step further than the New York senator's original ad, explicitly detailing the national security threats America faces.

"Uncertainty. Dangerous aggression. Rogue nations. Radicalism," the ad's narrator states as images of tanks and launching missiles flash on screen.

The ad also includes Clinton's attack on Barack Obama in March 2008 in which she declared "I know Senator McCain has a lifetime of experience that he will bring to the White House. And, Senator Obama has a speech he gave in 2002."

The commercial is the fourth Republican ad in the last week to invoke Hillary Clinton's past criticisms of her party's presumptive presidential nominee, and comes the same night the New York senator is set to make a public urge for unity at the Democratic convention.

Speaking to New York Delegates in Denver Monday, Clinton said she did not support Republicans using her past words against Obama.

"I am Hillary Clinton and I do not approve that message," Clinton said Monday when asked about a McCain ad in which a Clinton backer says she will vote for the Arizona Republican.

Clinton's original 3 a.m. ad ran in Texas in the week ahead of that states critical primary is credited in part for her strong performance there. (She won the Texas primary, but lost its caucus.)