American counterterrorism agencies are quietly monitoring suspected sleeper cells on U.S. soil in the wake of joint U.S.–Israel strikes on Iran, stepping up surveillance amid heightened fears of possible retaliation from Iran-linked operatives or sympathizers.Federal and local law enforcement have also boosted on-the-ground security in major U.S. cities as part of a precautionary posture, even though no specific, credible threats have been publicly identified.

New York City’s socialist Mayor Zohran Mamdani is facing blowback from conservatives on social media over his post condemning the U.S. attack on Iran that led to the killing of Iran’s supreme leader, Ayatollah Ali Khamenei.On Saturday, as a joint strike on Iran by the United States and Israel was developing, Mamdani blasted the Trump administration’s decision in a post on X that has been viewed roughly 20 million times.

Iranian Ambassador to the United Nations Amir-Saeid Iravani condemned U.S. strikes against Iran that targeted the country’s military leadership and killed Supreme Leader Ali Khamenei, calling the attack a double standard and promising the country would defend itself at a U.N. Security Council meeting Saturday.Iravani accused the U.S. of undermining its claims of pursuing international stability while attacking a sovereign country for its “domestic” activities.

The partial government shutdown has Department of Homeland Security employees missing their paychecks even as the U.S. has engaged Iran with airstrikes that have brought the nation to the brink of war.On Saturday, the U.S. and Israel commenced targeting Iranian positions, including the palace of dictator Ayatollah Ali Hosseini Khamenei, who was later declared dead by Jerusalem officials. The strikes have prompted concerns of retaliation, possibly inside U.S. borders.

FIRST ON FOX: A major public policy nonprofit co-led by former Florida Gov. Jeb Bush praised President Donald Trump for ordering Saturday’s military strikes against Iran.United Against a Nuclear Iran (UANI) — was formed in 2008 by Ambassador Mark Wallace, who held a United Nations-centered post in Bush’s brother’s administration, and former George H.W. Bush diplomat Dennis Ross — to combat threats posed by the Islamic Republic.

Ben Rhodes, a leading figure within the Obama administration who pushed for the 2015 nuclear deal with Iran, was blasted on social media Saturday after he criticized U.S. military strikes on Iran. In the immediate aftermath of the joint attack by the U.S. and Israel, Rhodes was posting criticism of the administration on social media, saying Trump and Netanyahu “seem to be totally unconcerned about the human beings — on all sides — who will suffer.