Raising the stakes of its commitment to changing the political landscape in America, Punk Voter is launching the Rock Against Bush Tour.

Raising the stakes of its commitment to changing the political landscape in America, Punk Voter is launching the Rock Against Bush Tour. Kicking off Sept. 18 in Portland, Ore., the trek will feature such artists as Audioslave/Rage Against The Machine guitarist Tom Morello, Midtown and Anti-Flag.

"We've laid the groundwork over the last couple years by getting thousands of punks registered to vote," reads a message on PunkVoter.com. "Come join us for some good ol' fashioned punk rock dissent!"

At deadline, Morello was confirmed to appear on about half of the 15 scheduled dates. He is being billed as the Nightwatchman, an acoustic persona unveiled for his singer/songwriter-oriented political-leaning work. His "Union Song" and "House Gone Up in Flames" can be sampled at NightwatchmanMusic.com.

Other bands that will appear on various dates include Strike Anywhere, Epoxies, the AKA's and Mike Park.

A grassroots group founded by NOFX guitarist Fat Mike, Punk Voter is a coalition of artists and record labels aiming to "educate, register and mobilize progressive voters."

To date, the organization has issued a pair of CD/DVD compilations under the "Rock Against Bush" banner through Fat Mike's Fat Wreck Chords label. The first featured music by the likes of Offspring, Less Than Jake, Sum 41 and NOFX, as well as some of the bands on the tour.

Released in April, "Volume 1" topped Billboard's Top Independent Albums chart and has sold 117,000 copies in the United States, according to Nielsen SoundScan.

The just-released second volume sold 26,000 copies to debut this week at No. 45 on The Billboard 200. It boasts contributions from Green Day, Bad Religion, Sugarcult, Rancid, Sleater-Kinney, Hot Water Music and No Doubt, among others.

Here are the Rock Against Bush tour dates:

Sept. 18: Portland, Ore. (Roseland Theater)
Sept. 19: Seattle (Showbox)
Sept. 21: San Francisco (Fillmore)
Sept. 22: Los Angeles (Henry Fonda Theatre)
Sept. 23: Tempe, Ariz. (Marquee Theatre)
Sept. 24: Albuquerque, N.M. (Sunshine Theatre)
Sept. 25: Denver (Ogden Theatre)
Sept. 26: Kansas City, Mo. (Beaumont Club)
Sept. 27: Minneapolis (First Avenue)
Sept. 28: Chicago (Metro/Smart Bar)
Sept. 29: Cleveland (Agora Theatre)
Sept. 30: Columbus, Ohio (Newport Music Hall)
Oct. 1: Cincinnati (Bogart's)
Oct. 3: Tampa, Fla. (The Masquerade)
Oct. 9: Pittsburgh (The World)