WASHINGTON (AP) — House Republicans said Monday that they have the votes to disapprove of the Iran nuclear deal as Democrats stepped of their support of the agreement the Obama administration and other world powers negotiated with Tehran.

Since Republicans hold a commanding 246 seats in the House, it was widely expected that the GOP would come up with 218 votes to support a resolution of disapproval, which has been introduced by Rep. Peter Roskam, R-Ill.

"Time is not the friend of this deal," Roskam said in a statement. "The more time members spend evaluating this agreement, the more they realize it's an historic mistake."

It's unclear, however, if there would be enough votes in the House to override President Barack Obama's expected veto of the legislation. The president is counting on Democrats to sustain his veto.

On Monday, California Reps. Adam Schiff and Anna Eshoo joined an expanding list of representatives who have announced their support of the international accord.

Schiff, the top Democrat on the House Intelligence Committee, said the deal "realistically precludes Iran from developing an atomic bomb" for at least 15 years.

Congress is engaged in a 60-day review of the deal, and Schiff's decision to back the agreement is a boost for Obama.

Eshoo said her decision was not based on trusting Iran. "To the contrary," she said, "the regime has a long list of offenses that I deeply object to, but there must be a mechanism in place to keep them from becoming a nuclear power."