With Congress in the midst of a 60-day period to review the Iran nuclear deal, two Democratic U.S. senators from Maryland—Ben Cardin and Barbara Mikulski—remain undecided about the agreement.

While it is expected that virtually all 54 Republicans in the Senate will vote against the Iran deal, 67 anti-deal votes are needed to override President Barack Obama’s veto of a possible Congressional rejection of the pact. The only two Senate Democrats who have publicly come out against the agreement so far are Chuck Schumer (N.Y.) and Robert Menendez (N.J.).

Asked where Cardin stands on the deal, and whether or not his decision will be affected by the recent report that the U.N.’s nuclear watchdog made a side agreement with Iran that allows the Islamic Republic to carry out its own inspections at the Parchin nuclear site, Cardin spokesperson Sue Walitsky said the senator “continues to review all aspects of the agreement to determine what decision he’ll make.”

“He continues to study the details of this deal, reach out to experts for answers to his many questions, and engage Marylanders to get their thoughts,” Walitsky told JNS.org. “There is great intensity on all sides of this issue, but the feedback has been decidedly mixed. … He does not plan to rush his decision based on what others may decide.”

When contacted by JNS.org, Mikulski’s office said the senator was traveling and unable to return a request for comment.