When you flip a light on today be sure to give thanks to Thomas Edison, who on this day in 1879 first demonstrated the incandescent lightbulb. Now for the day's top election stories:

"Romney Claws Back in Iowa Polls" (Laura Meckler, Wall Street Journal) A series of new polls out show Mitt Romney back in command of Iowa, where a surging Mike Huckabee was threatening. Huckabee's response is to go on the attack questioning Romney's honesty.

"Huckabee, Romney Make Sunday Push for Evangelicals" (Michael Shear and Perry Bacon Jr., Washington Post) The Huckabee-Romney feud spilled over into the church pews over the weekend, with Romney aides traversing the state making a final pitch to evangelical pastors. Huckabee, meanwhile, made his case yesterday on "Meet the Press."

"Democrats Hammer State to Secure Votes" (Thomas Beaumont, Des Moines Register) With John Edwards leading his rivals in at least one poll, all three of the top Democratic contenders scoured Iowa yesterday for those last few votes.

"Democrats Try Various Styles, and Pronouns" (Mark Leibovich, New York Times) A slightly different focus on the same Iowa theme, reporter Leibovich takes a look inside all these Iowa rallies -- from Hillary Clinton's "Time to Pick a President" to Barack Obama's "Stand For Change."

"Bloomberg Moves Closer to Running for President" (Sam Roberts, New York Times) Could the siren song of history prove too much for NYC Mayor Michael Bloomberg to resist? His aides, report Roberts, are out measuring interest, while the mayor himself is making sure to stay in the headlines.

"Giuliani Steers Clear of Political Fray" (Glen Johnson, Associated Press) While his two rivals Romney and Huckabee batter each other, Rudy Giuliani has been notably quiet, focusing his campaigning in Florida.

"Obama Makes Run to Middle" (Christina Bellantoni, Washington Times) Not quite as angry as his rival John Edwards, Obama is hoping that coming across as just your average Joe will sway those undecideds.

"McCain's Unlikely Ties to K Street" (Jeffrey Birnbaum and John Solomon, Washington Post) For a senator whose known for railing against pork spending and special interests, McCain's hobnobbing with wealthy CEOs and the like this campaign season raises some questions.

"Ron Paul's War Chest Swelled in 4th Quarter" (Mary Jacoby, Wall Street Journal) Whatever Paul's actual chances are in this race, he clearly has a future as a fundraiser if this whole presidential thing doesn't work out.

Get these and today's other election stories at RCP's Politics and Election page.