By a slim margin, voters would advise their representative in Congress to vote against President Barack Obama's healthcare bill, a new poll found.

48 percent of people told the Gallup poll that they would tell their lawmaker to vote against a health bill similar to Obama's, while 45 percent said they want their representative to vote in favor of the bill.

The three point margin is within the poll's four percent margin of error, and seven percent of respondents told Gallup they had no opinion on the legislation.

The close tally reflects the split public opinion over the healthcare proposals favored by the president as Democrats in Congress appear to be moving toward finishing work on the legislation.

The reasons cited by poll respondents for favoring or opposing the bill also closely track the lines of arguments made by lawmakers in support of and against the health reform plans.

29 percent of supporters of the bill cited concerns over too few people being uninsured as their main reason for favoring the legislation, while 20 percent of opponents said they feared the plan would make healthcare less affordable.

The poll was conducted March 4-7.