WASHINGTON  The Florida Democratic Party chairwoman on Monday officially buried the possibility of redoing the state’s disputed January presidential primary, saying there was no practical or affordable way to conduct a new election.

The chairwoman, Karen L. Thurman, essentially threw up her hands after failing to secure approval for a new election from state officials or the campaigns of Senators Hillary Rodham Clinton and Barack Obama.

She said in a statement late Monday that party officials in Florida had proposed such a plan last week. It was unceremoniously shot down, she said.

“Thousands of people responded,” Ms. Thurman said. “We spent the weekend reviewing your messages, and while your reasons vary widely, the consensus is clear: Florida doesn’t want to vote again. So we won’t.”