Three possible presidential candidates are being urged to drop their calls to undo repeal of “Don't Ask, Don't Tell.”

Mississippi Governor Haley Barbour and former Governors Tim Pawlenty of Minnesota and Mike Huckabee of Arkansas have called for the reinstatement of the law that bans gay and bisexual troops from serving openly.

Congress approved and President Barack Obama signed into law a bill last year that ends the ban. But implementation will not begin until 60 days after the president and Pentagon leaders agree the military is ready for the change. At a House hearing on Friday, military leaders said they expect to implement repeal by summer's end.

In January, Pawlenty was the first social conservative Republican to say that as president he would fight for the law's return.

On the radio program of the American Family Association's (AFA) Bryan Fischer, Pawlenty said he would sign such a bill.

“I've been a public supporter of maintaining 'Don't Ask, Don't Tell' and I would support reinstating it as well,” Pawlenty said.

Huckabee backed the idea last month.

“I would – because that's really what the military wants. There's been some talk that the military is fine with having same-sex orientation people,” he told the AFA's One News Now. “But if you really surveyed the combat troops, that is not at all the case.”

The former Baptist minister added that soldiers, not politicians, should decide the issue.

“I don't think that these are decisions that politicians should make,” he said. “These are decisions that soldiers should make. And when the soldiers in the foxholes make the decisions, they choose something different – and we should listen to them.”

Days later, on Fischer's program, Haley Barbour joined the chorus, saying that an “amorous mindset” would interfere with critical decision making on the battlefield.

“When you're under fire and people are living and dying of split-second decisions you don't need any kind of amorous mindset that can affect saving people's lives and killing bad guys,” Barbour told his host. “You look at the data and it is the foot soldier that is the person who is out there, boots on the ground, who was most against this.”

In letters to the likely candidates, the Servicemembers Legal Defense Network (SLDN), the largest group that lobbied for repeal of the law, urged them to abandon their calls.

“Perhaps since you were not in Congress during the past few years, you did not follow the debate about whether to repeal 'Don't Ask, Don't Tell,'” wrote Aubrey Sarvis, executive director of SLDN. “This isn't – and never has been – a partisan political issue. Many Republicans in the Senate and House voted for repeal last year. Without them, the legislation would not have been enacted.”

“And perhaps you did not review the report prepared by the Pentagon working group after its exhaustive nine-month study, a report which found no barriers to repeal.”

“We shouldn't be debating whether or not to turn back the clock on an issue that has already been decided by the Congress, the President, and the American people,” Sarvis concluded. “We should be accelerating the timeline for certification and full repeal and working toward full equality for all LGBT service members.”