House Minority Whip Steny Hoyer said Tuesday that he will not support the nuclear deal with Iran unless it includes "meaningful and effective" methods to verify that Iran is complying with the agreement.

Hoyer, D-Md., said he is planning to review the terms of the agreement but if it lacks stringent verification, he won't back it.

"Without verification, this is a useless agreement," Hoyer said. "Without verification that is meaningful and effective, it's not an agreement that I can support. That is a very, very important question for me."

Hoyer echoed the sentiments of other House Democrats who have been longtime backers of the Iranian sanctions and who are not immediately declaring support for the agreement.

Rep. Rosa DeLauro, D-Conn., issued a statement Tuesday promising to score the details of the deal "to ensure it contains the highest standards — not based on trust, but on verification — to keep Iran accountable, allow for rigorous international inspections and ensure that Iran will not have access to nuclear weapons."

Rep. Steve Israel, D-N.Y., said Democratic support is not assured, despite a general backing from Democratic presidential candidate Hillary Clinton.

"It depends on what's in the deal," Israel said. "It's premature to make a projection how many votes are going to be for or against this deal at the end of the day when this deal is less than 12 hours old."

Israel described himself as "skeptical" of the accord, but said he plans to review "every noun, every verb and every clause" before making a decision.

As part of the deal announced Tuesday morning, Iran could have up to 24 days warning of an inspection from the International Atomic Energy Agency, which is far from the snap inspections some in Congress had been demanding.

Hoyer said while he didn't expect snap inspections without notice, the length of time will play a significant role in his decision whether to back the deal.

"My thought was there would always be a notice period," for an inspection, Hoyer said. "Now, how long the notice is and what could be accomplished within that notice period to undermine the utility of the inspection, that is all going to be part of what I'm looking at, and it will inform me in my judgment as to whether or not it is something I can support."