NEW YORK -- The Trump administration is "trying to avoid bumper stickers and slogans" in its approach to the Israeli-Palestinian process, a State Department official said Monday after the president discussed the issue with Israeli Prime Minister Benjamin Netanyahu.

Negotiations about a potential Middle East peace deal are still in the "very early stages," Brian Hook, director of policy planning at the State Department, told reporters traveling with the president in New York on Monday.

But Trump continues to believe peace between Israel and Palestine is possible, Hook said.

Netanyahu and Trump discussed Iran at length during their bilateral discussion, Hook noted, and the two agreed more must be done to crack down on Iranian provocations outside of the Iran nuclear deal. Trump also focused on the Iran agreement during his meeting later in the day with French President Emmanuel Macron.

The three leaders all agreed on their "deep and abiding concern about Iran's activities in Syria and broadly," Hook said.

"We are taking a comprehensive approach to the range of Iranian activities: its threat network, its ballistic missile systems, its nuclear program," Hook said.

The State Department official declined to predict what the president would do when faced with a deadline to recertify the Iran deal next month.

But Israel and other U.S. allies have long harbored concerns about the agreement, and Trump has increasingly lashed out at Tehran for its behavior in the region and its support for terrorist groups.