Click here to watch "Respected."

Colorado Rep. Mark Udall (D) isn't afraid to talk about the war on terror. During his bid to represent Colorado in the Senate, that's meant taking jabs at his GOP opponent, former Congressman Bob Schaffer, for "rubber-stamping" the Iraq war, showing his support for the 21st Century GI Bill on the steps of the state Capitol and, most recently, outlining his plans to protect the country in two new TV ads.

"It isn't just something you see; security is something you feel," Udall says in "Respected" (subscription), which began airing Tuesday in Denver. "That's why we've got to defeat al-Qaida where they're based -- in Afghanistan -- and finally hunt down Osama bin Laden."

Udall's other recent spot (subscription), released May 30 throughout Colorado, touches on his plans to revamp the military. "These days, maybe you're wondering, isn't there a better way to protect America?" Udall says in the ad. "I think so. Add an entire new division to our Army. Do right by our veterans."

These ads are Udall's second and third of the race to replace departing Republican Wayne Allard. Both Udall and Schaffer released their debut spots in mid-May.

The focus on national security is something of a departure from Udall's first ad, which touted his energy policy and framed him as an environmentally friendly candidate. But campaign spokeswoman Taylor West pointed to Udall's membership on the House Armed Services Committee -- which "Respected" references -- and his vote against the Iraq war resolution as examples of his commitment to security issues.

"Mark voted against the Iraq war from the very beginning because he felt that our focus needed to be on al-Qaida and Afghanistan," West said. "Voters understand we have critical national security needs and that the war in Iraq is not making us safer," she added. "That is something Mark has understand for a long time, and that's part of what we're speaking to."