Bush Bumper Stickers:
it's never too late to do the right thing.

What Part of "Bush Lied" Don't You Understand?
No, Seriously, Why Did We Invade Iraq?
Impeachment: It's Not Just for Blowjobs Anymore
Make Interns, Not War
Bush Doesn't Care About White People, Either
Let's Fix Democracy in This Country First
You Elected Him. You Deserve Him.
If You Want a Nation Ruled By Religion, Move to Iran
At Least Nixon Resigned
Jail to the Chief
Pray For Impeachment
Whose God Do You Kill For?
The Republican Party: Our Bridge to the 11th Century
Of Course It Hurts: You're Getting Screwed by an Elephant
One Nation Under Clod
If You Can Read This, You're Not Our President
Impeach Cheney First
Cheney/Satan '08
Hey, Bush Supporters: Embarrassed Yet?
Dubya, Your Dad Shoulda Pulled Out, Too
We Need a President Who's Fluent In At Least One Language
Bad President! No Banana.
We're Making Enemies Faster Than We Can Kill Them
Is It Vietnam Yet?
Bush. Like a Rock. Only Dumber.
Where Are We Going? And Why Are We In This Handbasket?
That's OK, I Wasn't Using My Civil Liberties Anyway
America: One Nation, Under Surveillance
George W. Bush:
Creating the Terrorists Our Kids Will Have to Fight
2004: Embarrassed
2005: Horrified
2006: Terrified
Honor With Impeachment
Bush: God's Way of Proving Intelligent Design is Full Of Crap
When Bush Took Office, Gas Was $1.46
Bush Never Exhaled

As far as I know, these are public domain. Any information to the contrary will be appreciated, and credit given where due.