About 6% of likely caucus-goers in each party remain undecided of their choice in Thursday’s contest, the first big test in the state-by-state battle to choose Republican and Democratic candidates in November’s presidential election.
“It’s about as close as you can get at the top in both races,” pollster John Zogby said. “But it’s still very uncertain.”
The poll of 899 likely Democratic caucus-goers and 902 likely Republican caucus-goers was taken between Thursday and Saturday and has a margin of error of 3.3 percentage points for each party.
Most of the top candidates in both parties have been crisscrossing Iowa for days in a late hunt for support that could give them an edge and, momentum for later contests.
The poll found Clinton’s supporters remained the most dedicated with 73% saying their support was “very” strong, compared to 66 percent for Edwards and 63 percent for Obama.
In the tight Republican contest in Iowa, Mike Huckabee narrowly leads Mitt Romney, who slipped by one point to trail 29 percent to 27%.
Huckabee held on to his slim two-point lead despite an Iowa ad campaign from Romney attacking Huckabee’s record as governor of Arkansas.