A majority of voters oppose closing the Guantánamo Bay detention facility, according to a survey released Thursday.

The Rasmussen Reports poll, conducted after President Obama unveiled his most recent plan to shutter the facility, found that 56 percent of respondents want the military prison to stay open.

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The same percentage said that detainees should not be moved to the United States and that releasing detainees has made the United States less safe.

There are 91 detainees at Guantánamo now, down from a height of nearly 800.

Obama’s plan, released Tuesday, would transfer some detainees abroad, continue prosecuting others and move the rest to a facility stateside. Republican lawmakers slammed the proposal, calling it vague and dangerous.

Thursday's poll shows an increase in opposition from when Obama first took office and pledged to close the facility. In 2009, Rasmussen found 44 percent of voters supported closing the facility, compared to 42 percent who opposed.

Feelings on closing the facility break along party lines, with 80 percent of Republicans opposed compared to 35 percent of Democrats. Forty-eight percent of Democrats say it should be shuttered.

Republicans were also staunchly opposed to transferring detainees to the United States, with 75 percent saying that shouldn’t happen.

For Democrats, 47 percent supported bringing detainees stateside, while 40 percent are opposed.

The survey 1,000 likely voters was conducted Tuesday and Wednesday. The margin of error is plus or minus 3 percentage points.