[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/01/15/art.browncoakley.gi.jpg caption="Tuesday's special senate election in Massachusetts between Democrat Martha Coakley and Republican Scott Brown is deadlocked, according to a new poll."](CNN) - Tuesday's special senate election in Massachusetts between Democrat Martha Coakley and Republican Scott Brown is deadlocked, according to a new poll.
The race is a battle to fill out the final three years of the term of the late Democratic Sen. Ted Kennedy, but also at stake is the Democrat's supermajority in the Senate, and possibly the fate of the party's and President Barack Obama's drive for health care reform.
A Suffolk University/7 News poll released Thursday night indicates that 50 percent of likely votes back Brown, a state senator, with 46 percent supporting Coakley, the Massachusetts attorney general. Brown's 4 point lead is within the survey's sampling error. Three percent of people questioned back Joseph Kennedy, a third party candidate who is not related to the late senator.
"It's a massive change in the political landscape," says David Paleologos, director of Suffolk's Political Research Center.
A Boston Globe poll released last weekend indicated Coakley had a 15 point lead over Brown, but other recent surveys, including several partisan polls, suggested the race was much closer. Thursday afternoon two well respected non-partisan national political analysts, Charlie Cook and Stuart Rothenberg, rated the race a toss up.
According to the Suffolk University survey, Brown is grabbing 65 percent of independent voters, with just 3 in 10 pulling for Coakley. And 17 percent of Democrats questioned say they're supporting Brown.
Democrats dominate most elections in Massachusetts, and no Bay State Republican has won an election to the U.S.Senate since 1972. But If Brown pulls an upset and defeats Coakley, the Democrats will lose their 60 seat filibuster-proof coalition in the Senate, which could severely threaten the party's chances of passing a health care reform bill in Congress and handing it to President Barack Obama to sign into law. Brown says he would vote against the bill. Health care reform was an issue that the late Sen. Kennedy championed.
Health care reform was an issue that the late Sen. Kennedy championed. The 77-year-old senator died of brain cancer in August. Democrat Paul Kirk, a long time adviser and friend to Kennedy, is serving as his interim replacement and does support the health care bill. The Massachusetts' Democratic secretary of state said this week that certifying Tuesday's election results could take more than two weeks, which could give Congressional Democrats time to pass a health care bill. Republicans are blasting any such delay.
The poll indicates that 51 percent of voters oppose the health care reform legislation, with more than 6 in 10 saying they believe the government can't afford to pay for it.
The Suffolk University survey was conducted Monday through Wednesday, with 500 people likely to vote in the January 19 special election questioned by telephone. The poll's sampling error is plus or minus 4.4 percentage points.
Both campaigns have raised large sums of cash in the past week and combined have spent well over a $1 million on television commercials. National party organizations as well as Independent groups have also flooded the airwaves in Massachusetts.
Friday two well known out of state surrogates are teaming up with the candidates. Former President Bill Clinton holds rallies in Boston and Worcester for Coakley and former New York City Mayor and 2008 GOP presidential candidate Rudy Giuliani teams up with Brown.
Follow Paul Steinhauser on Twitter: @psteinhausercnn