Back in the United States, Iowans head to the polls today in the first caucus of the primary season. The latest polls show Democratic frontrunners Hillary Rodham Clinton, Barack Obama and John Edwards in a statistical three-way tie. Clinton addressed supporters Wednesday at a campaign stop in Indianola, Iowa.

Sen. Hillary Rodham Clinton: “Now everyone running for your support is talking about change. Some people think you bring about change by demanding it. Some people think you bring about change by hoping for it. I think you make change by working really, really hard for it every single day.”

Meanwhile, Barack Obama has picked up an endorsement from another Democratic challenger, Dennis Kucinich. In a statement, Kucinich urged his supporters to back Obama if Kucinich fails to meet the required 15 percent threshold. Voters are allowed to realign with another candidate if their first choice fails to attract enough votes. Kucinich says his endorsement for Obama is limited to Iowa, and he still hopes to compete nationwide. Meanwhile, the publication Politico reports consumer advocate and former presidential candidate Ralph Nader has “expressed his strong support” for John Edwards. Nader says he supports Edwards’s promise to challenge corporate interests. On Wednesday, Edwards said he would withdraw virtually all U.S. troops from Iraq within ten months of being elected. More on the Iowa vote after headlines.