NPR knocked on doors throughout Colorado to find out how individual voters were responding to Democratic and Republican appeals in the lead up to Election Day. Molly Messick/NPR hide caption

itoggle caption Molly Messick/NPR

Democrat Charlie Crist, a former Republican governor of Florida (left), and Rick Scott, the current Republican governor of Florida, listen to the moderators during a gubernatorial debate on Friday. The two are facing off in a tight race that's fueling a barrage of negative campaign ads. Lynne Sladky/AP hide caption

itoggle caption Lynne Sladky/AP

Republican officials Rob Collins, Phil Cox and Matt Walter all seemed pleased at a briefing for journalists about the GOP's midterm election prospects, as did former first lady Mamie Eisenhower. Frank James/NPR hide caption

itoggle caption Frank James/NPR

Some voters are a lot more complicated than is commonly understood, a new Pew Research Center study suggests. In Denver, an election worker collects a mail-in ballot from a voter on Tuesday. Ed Andrieski/AP hide caption

itoggle caption Ed Andrieski/AP

Catching up with a national trend, more Hispanics say they are not affiliated with a particular religion — a shift that could make the gap between Latinos and Republicans even wider. iStockphoto hide caption

itoggle caption iStockphoto

Volunteer Tom Strain carries debris from an empty lot as part of an Earth Day cleanup effort in Camden, N.J. The Earth Day events celebrated on April 22 promote a sustainable and clean environment. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

President Obama, pictured here with Lilly Ledbetter, and congressional Democrats are working the equal pay issue hard in a midterm election year when they will need as many women to vote as possible. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

Hilary Clinton at last week's Clinton Global Initiative forum in in New York City. /PA Photos/Landov hide caption

itoggle caption /PA Photos/Landov

Rep. Justin Amash of Michigan, a libertarian Republican, says recent surveillance leaks have "brought home" libertarian ideas. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

During the 2012 campaign cycle, CNN was among several news networks that hosted Republican debates. Now, the GOP says it doesn't want to be on either that network or NBC. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images