Fifty percent (50%) of U.S. voters say they are less likely to vote for their representative in Congress this November if he or she votes for the health care plan proposed by President Obama and congressional Democrats.

A new Rasmussen Reports national telephone survey taken Wednesday night finds that 34% are more likely to vote for their Congress member’s reelection if he or she supports the president’s health care plan. Eight percent (8%) say the health care vote will have no impact on how they vote this November, and another seven percent (7%) are not sure.

Thirty-three percent (33%) of all voters favor the creation of a single-payer health care system where the federal government provides coverage for everyone. Fifty-four percent (54%) oppose such a system. These findings are unchanged from the end of last year. Support for a single-payer system plays a huge role in whether someone will support a Representative who votes for the health care plan.

Sixty-six percent (66%) of those who favor a single-payer system are more likely to vote for a member of Congress who votes for the health care plan. Seventy-nine percent (79%) of those who oppose a single-payer system are less likely to vote for a health care plan supporter.

With every Republican in Congress opposed to the health care plan, it’s not surprising to find that 79% of GOP voters are less likely to vote for someone who supports it. Fifty-five percent (55%) of Democrats, on the other hand, are more likely to vote for a member of Congress who votes for the plan.

But perhaps more significantly, 51% of voters not affiliated with either major party are less likely to support someone who votes for the legislation. Just 32% of unaffiliateds are more likely to vote for someone who supports the bill.

Sixty-three percent (63%) of voters now think it would be better for the country if most incumbents in Congress were defeated this November. Just 27% of voters say their representative in Congress is the best possible person for the job.

While the president and Democratic congressional leaders push for passage of the health care plan with a vote possible as early as this weekend, most voters continue to oppose it. Forty-five percent (45%) now favor the plan, while 52% oppose it. This marks the highest level of support since mid-November. The new findings include 29% who Strongly Favor the plan and 45% who Strongly Oppose it.

Since the beginning of last November, support for the plan has ranged from a low of 38% to a high of 47%. Opposition has ranged from 49% to 58%. Those who Strongly Oppose the plan have consistently far outnumbered those who Strongly Favor it.

(Want a free daily e-mail update? If it's in the news, it's in our polls). Rasmussen Reports updates are also available on Twitter or Facebook.

Fifty-six percent (56%) of male voters are more likely to vote against an incumbent who supports the health care plan, compared to 45% of female voters.

Three-out-of-four voters (75%) are angry at the policies of the federal government. Part of the frustration is likely due to the belief of 60% of voters that neither Republican political leaders nor Democratic political leaders have a good understanding of what is needed today.

Just 21% believe that the federal government enjoys the consent of the governed.

Last month, voter unhappiness with Congress as a whole reached its highest level ever, with 71% saying the legislature is doing a poor job.

Three of Congress' four top leaders – House Speaker Nancy Pelosi, Senate Majority Leader Harry Reid and House Minority Leader John Boehner - last week reached or matched their highest unfavorable ratings of the past year. Pelosi, the leading congressional advocate of the health care reform bill, remains the most unpopular leader, as she has been for months. Pelosi is now viewed unfavorably by 64% of voters. Reid, who was reelected with 61% of the vote in 2004, now trails his three top Republican challengers in his bid for reelection this November.

Rasmussen Reports has recently surveyed Senate races in Arizona, Arkansas, Colorado, Illinois, Indiana, Kentucky, Louisiana, Maryland, Missouri,Nevada, New Hampshire, New York, North Carolina, North Dakota, Florida, Connecticut, Pennsylvania, Oklahoma, Ohio, Oregon, Washington and Wisconsin. Most show a troubling political environment for Democrats, particularly incumbents.

Please sign up for the Rasmussen Reports daily e-mail update (it’s free) or follow us on Twitter or Facebook. Let us keep you up to date with the latest public opinion news.

See survey questions and toplines. Crosstabs and are available to Premium Members.