Sen. Kirsten Gillibrand (D-NY) said Thursday that Republicans' "war on women" would ultimately be a failure.

Republicans have accused Obama of waging a war on religion because of a White House plan to require most insurance plans to cover birth control, without an exemption for religious employers. Churches and some parochial schools are exempt, however.

"I think the Republican leadership here in Washington has waged a war during the last few years that has really not stopped, with the first bill to defund Title X, to make sure at risk women couldn't get breast exams and prenatal care," Gillibrand said on Current TV's The War Room with Jennifer Granholm. "I think their focus on undermining basic protections for women has been outrageous and I'm mystified, I cannot believe that they now are trying to attack women's ability just to get basic health care."

"I don't believe bosses should be able to determine what kind of health care their employees have access to," she added.

In response to Obama's proposed plan, Sen. Marco Rubio (R-FL) introduced legislation that would grant an exemption to any employer who claims to have a religious objection to contraceptives.

"I think it has no chance of passing," Gillibrand said. "I can’t believe that today... in 2012, we’re talking about basic access to birth control, basic reproductive healthcare. It really is an attack on women and I think it will fail."

Watch video, courtesy of Current TV, below: