CUMMING, Iowa — U.S. Sen. Tom Harkin said Saturday he will not seek a sixth term in 2014, a decision that frees a new generation of Iowa Democrats to seek higher office and eases some of the burden Republicans face in retaking the Senate.
Harkin, chairman of an influential Senate committee, announced his decision during an interview with The Associated Press, and said the move could surprise some.
But the 73-year-old cited his age — he would be 81 at the end of a sixth term — as a factor in the decision, saying it was time to pass the torch he has held for nearly 30 years.
"I just think it's time for me to step aside," Harkin told the AP.
Harkin, first elected in 1984, ranks 7th in seniority, and 4th among majority Democrats. He is chairman of the health, education, labor and pensions committee, and chairman of the largest appropriations subcommittee.
He has long aligned with the Senate's more liberal members, and his signature legislative accomplishment is the 1990 Americans with Disabilities Act. He also served as a key salesman of President Barack Obama's 2010 health care bill to the wary left.
"I'm not saying that giving this up and walking away is easy. It's very tough," Harkin said at his rural Iowa home south of Des Moines. "But I'm not quitting today. I'm not passing the torch sitting down."
Harkin's news defied outward signals. He has $2.7 million in his campaign war chest, second most among members nearing the end of their terms, and was planning a gala fundraiser in Washington, D.C., next month featuring pop star Lady Gaga.
The news creates a rare open Senate seat Iowa. Harkin, Iowa's junior senator, is outranked by Sen. Charles Grassley, who has held the state's other seat since 1980.
Attention will turn immediately to U.S. Rep. Bruce Braley, a fourth-term Democrat from Waterloo. Braley, who was traveling in Iowa Saturday, did not immediately respond to e-mail and telephone requests to his staff by the AP.
Harkin held open the possibility of endorsing a Democrat before the party's primary if the candidate fit the profile of "someone who is progressive, who is a pragmatic progressive."
Although no Republicans have stepped forward, Harkin's news gives the GOP's private huddles new life.
"There are lots of conversations, but it's very early still," said Nick Ryan, an Iowa Republican campaign fundraiser.
U.S. Rep. Tom Latham of Clive is a seasoned Republican congressman, a veteran appropriations committee member and a robust fundraiser who has survived challenges to win 10 consecutive terms. Aides to Latham declined to comment beyond issuing a statement saying the congressman "respects Sen. Harkin's decision (and) looks forward to continuing to work with him."
But with opening a door in Iowa, Harkin has created a potential headache for his party nationally.
Democrats likely would have had the edge in 2014 with the seat, considering Harkin's fundraising prowess and healthy approval. A poll by the Des Moines Register taken last fall showed a majority of Iowans approved of his job performance.
Democrats hold a 55-45 advantage in the Senate, requiring Republicans to gain six seats to win back the chamber. But Democrats have more seats to defend in 2014_20 compared to only 13 for Republicans.
And the president's party historically loses seats in the midterm elections after his re-election. Obama, a Democrat, was re-elected last year.
Democrats will be scrambling to hold onto the seat in GOP-leaning West Virginia, where five-term Democratic Sen. Jay Rockefeller recently announced he would not seek re-election. Republican Rep. Shelley Moore Capito is running for the Senate seat.
Democratic incumbents also face tough re-election races in Arkansas, Louisiana, Montana, North Carolina and Alaska — all states carried by Republican presidential nominee Mitt Romney in November's presidential election.
Since the election, Harkin has stepped up his role as one of the Senate's leading liberal populists.
He was a vocal opponent late last year of President Barack Obama's concession to lift the income threshold for higher taxes to avoid the so-called fiscal cliff. Harkin instead supported raising taxes on all earners making more than $250,000 a year.
He also endorsed Obama's call for banning assault rifles and larger ammunition magazines in the wake of the Connecticut school shooting last month
Despite Harkin's strong political position, he has faced questions about his and his wife Ruth's role in developing a namesake policy institute at Iowa State University, Harkin's alma mater.
The Harkins and their supporters have been pushing for the institute to house papers highlighting his signature achievements, including the ADA and shaping farm policy as the former chairman of the agriculture committee.
In one long-running dispute, they've pressed ISU's president to rescind rules restricting the institute's ability to research agriculture, which Harkin derided as a violation of academic freedom. And Harkin has evaded questions about his role in fundraising for the institute after disclosure reports showed some of its largest donors are firms that have benefited from his policies.
Harkin dismissed that those questions had any bearing on his decision.
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