Democratic Congressional candidates have moved further ahead of Republicans this week in the latest edition of the Generic Congressional Ballot.

The latest Rasmussen Reports national telephone survey found that 41% would vote for their district’s Democratic congressional candidate while 38% would choose the Republican.

Support for Democrats is up one point from last week, while support for the GOP has dropped a point. The latest results mark the lowest level of support for the GOP since April 12, while they mark the highest level of support for the Democrats since the end of March.

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Over the past year, Democratic support has ranged from a low of 38% to a high of 50%. In that same time period, Republicans have been preferred by 34% to 41% of voters nationwide.

During calendar 2009, Democratic support has ranged from 38% to 42%, while the Republican range has been from 35% to 41%.

Democrats began the year holding a six- or seven-point lead over the GOP for the first several weeks of 2009. That began to slip in early February, and the Republicans actually took a two-point lead for a single week in the middle of March. Since mid-April, the results have ranged from dead even to two-point leads for the GOP before the Democrats regained a small lead last week.

A big change this week came among men, who are now evenly divided between the parties at 40% each. A week ago, men favored the GOP by a 44% to 35% margin. Women continue to prefer Democrats 42% to 36%.

Voters not affiliated with either party favor the GOP by a 33% to 26% margin, which is closer than last week.

Rasmussen polling this week finds that 49% of voters now oppose the closing of the Guantanamo Bay prison camp in Cuba, while 38% agree with the decision. Only 25% agree with President Obama that the prison camp weakened America’s national security.

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