Democrat North Carolina Sen. Kay Hagan is opposing a tax cut plan that has won overwhelming support from her colleagues.
Hagan announced Monday that she would not vote in favor of a bill that would give tax cuts to people making over $1 million a year and add $858 billion to the national debt. She says Democrats and Republicans need to stop making empty promises about bringing down the deficit.
President Barack Obama and congressional Republicans had agreed to the bill, extending the tax cuts for every wage earner and extending jobless benefits for the long-term unemployed.
Monday's vote pushes the measure past a procedural hurdle ahead of an expected vote on the bill in the next day or two.
Republican North Carolina Sen. Richard Burr is supporting the measure.