Trump to make announcement on fate of Iran nuclear deal Friday

Trump is expected to announce his decision on Iran nuclear deal on Friday.

As ABC News has previously reported, President Trump is expected to “decertify” the Iran nuclear deal forged by the Obama administration and declare that it no longer serves U.S. national security interests.

That decision not to certify the agreement would give Congress 60 days to re-impose sanctions against Iran that were suspended in 2015 as part of the agreement.

Trump could also ask Congress to impose additional non-nuclear sanctions -- such as penalties against Iran’s ballistic missile program -- on Iran, which would not end U.S. participation in the nuclear agreement. He could also ask lawmakers to amend the existing law requiring he re-certify Iran's compliance with the agreement every 90 days.

Republicans critical of the initial deal have urged the administration to enforce it.

“As flawed as the deal is, I believe we must now enforce the hell out of it,” House Foreign Affairs Committee Chairman Ed Royce, R-Calif., said in a hearing Wednesday. “Let’s work with allies to make certain that international inspectors have better access to possible nuclear sites, and we should address the fundamental sunset shortcoming, as our allies have recognized.”

ABC's Ali Rogin contributed to this report.