Rep. Carolyn Maloney, the U.S. Representative for New York’s 12th congressional district, said Wednesday she will vote against President Barack Obama’s nuclear deal with Iran.

“There are strong arguments for and against the agreement but, as a matter of conscience, I have decided to oppose it,” Maloney said in a statement to the New York Daily News.

Maloney said she is “concerned that, even if Iran complies with the restraints spelled out throughout the life of the agreement, the deal does not block Iran from eventually acquiring nuclear weapons.”

Most observers estimate that while House and Senate opponents could successfully pass a resolution of disapproval blocking Obama from lifting sanctions on Iran, it appears unlikely that they will garner the two-thirds of votes in both chambers needed to override Obama’s veto of that measure.