Sen. Jon Tester, D-Mont., (center) campaigns at a parade Saturday in Belgrade, Mont. Martin Kaste/NPR hide caption

itoggle caption Martin Kaste/NPR

Both President Obama and rival Mitt Romney say the tax code is too complicated. But they haven't been specific about which tax breaks they want to eliminate. Tim Boyle/Getty Images hide caption

itoggle caption Tim Boyle/Getty Images

An advertisement for then-presidential candidate Barack Obama appeared in the Xbox 360 Live version of the video game Need for Speed: Carbon in 2008. Again this year, Obama is advertising in video games. AP/Electronic Arts Inc. via Obama campaign hide caption

itoggle caption AP/Electronic Arts Inc. via Obama campaign

Voters these days often reward politicians who sit at either end of the ideological spectrum while punishing those seen as compromisers. iStockphoto.com hide caption

itoggle caption iStockphoto.com

President Obama speaks during a campaign event at University of Colorado Boulder Sept. 2. He and his Republican challenger, Mitt Romney, will have their first debate at the University of Denver on Wednesday. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP