President Donald Trump on Monday sent an official notification to Congress about the U.S. strikes against Iran, in which he attempted to justify the military action in the now expanding conflict in the Middle East.

In a letter obtained by FOX News, Trump told Senate President Pro Tempore Chuck Grassley, R-Iowa, that “no U.S. ground forces were used in these strikes” and that the mission “was planned and executed in a manner designed to minimize civilian casualties, deter future attacks, and neutralize Iran’s malign activities.”

This comes after joint U.S.-Israeli strikes against Iran on Saturday as part of Operation Epic Fury, triggering a response from Tehran and a wider conflict in the region. The strikes killed the Islamic Republic’s Supreme Leader Ali Khamenei and other military leaders.

Trump wrote that it is not yet possible to know the full scope of military operations against Iran and that U.S. forces are prepared to take potential further action.

“Although the United States desires a quick and enduring peace, not possible at this time to know the full scope and duration of military operations that may be necessary,” Trump wrote. “As such, United States forces remain postured to take further action, as necessary and appropriate, to address further threats and attacks upon the United States or its allies and partners, and ensure the Government of the Islamic Republic of Iran ceases being a threat to the United States, its allies, and the international community.”

“I directed this military action consistent with my responsibility to protect Americans and United States interests both at home and abroad and in furtherance of United States national security and foreign policy interests,” he added. “I acted pursuant to my constitutional authority as Commander in Chief and Chief Executive to conduct United States foreign relations.”

Trump said he was “providing this report as part of my efforts to keep the Congress fully informed, consistent with the War Powers Resolution,” as some Republican and Democrat lawmakers attempt to restrain the president’s military action, which they affirm is unconstitutional without congressional approval.

The president also accused Iran of being among the largest state sponsors of terrorism in the world and purported that the “Iranian regime continues to seek the means to possess and employ nuclear weapons,” even after the White House said in June that precision strikes at the time “obliterated” Iran’s nuclear enrichment facilities.

US SURGES FORCES TO MIDDLE EAST AS PENTAGON WARNS IRAN FIGHT ‘WILL TAKE SOME TIME’

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“As I previously communicated to the Congress, Iran remains one of the largest, if not the largest, state-sponsors of terrorism in the world,” Trump said in the letter on Monday. “Despite the success of Operation MIDNIGHT HAMMER, the Iranian regime continues to seek the means to possess and employ nuclear weapons. Its array of ballistic, cruise, anti-ship, and other missiles pose a direct threat to and are attacking United States forces, commercial vessels, and civilians, as well as those of our allies and partners.”

“Despite my Administration’s repeated efforts to achieve a diplomatic solution to Iran’s malign behavior, the threat to the United States and its allies and partners became untenable,” he continued.

Fox News’ Tyler Olson contributed to this report.

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Northern California Rep. Kevin Kiley (R-Rocklin), whose congressional district was carved up in the redistricting ballot measures approved by voters last year, announced Monday that he would not challenge fellow Republican Rep. Tom McClintock of Elk Grove. Instead, he plans to run in the Democratic-leaning district where he resides.

“It’s true that I was fully prepared to run in [McClintock’s district], having tested the waters and with polls showing a favorable outlook in a ‘safe’ district. But doing what’s easy and what’s right are often not the same,” Kiley posted on the social media site X. “And at the end of the day, as much as I love the communities in [that] District that I represent now – and as excited as I was about the new ones – seeking office in a district that doesn’t include my hometown didn’t feel right.”

Kiley, 41, currently represents a congressional district that spans Lake Tahoe to Sacramento. He did not respond to requests for comment.

But after California voters in November passed Proposition 50 — a ballot measure to redraw the state’s congressional districts in an effort to counter Trump’s moves to increase the numbers of Republicans in Congress — Kiley’s district was sliced up into other districts.

As the filing deadline approaches, Kiley pondered his path forward in a decision that was compared by political insiders to the reality television show “The Bachelor.” Who would receive the final rose? McClintock’s new sprawling congressional district includes swaths of gold country, the Central Valley and Death Valley. The district Kiley opted to run in includes the city of Sacramento and the suburbs of Roseville and Rocklin in Placer County.

Kiley was facing headwinds because of the Republican institutional support that lined up behind McClintock, 69, who has been in Congress since 2009 and served in the state Legislature for 26 years previously. President Trump, the California Republican Party and the Club for Growth’s political action committee are among the people and groups who have endorsed McClintock.

Conservative strategist Jon Fleischman, a former executive director of the state GOP, said he was thrilled by Kiley’s decision, which avoids a divisive intraparty battle.

“If you open up the dictionary and look for the word conservative, it’s a photo of Tom McClintock. He is the ideological leader of conservatives, not only in California but in Congress for many, many years,” Fleischman said, adding that the endorsements for McClintock purposefully came because Kiley was considering challenging him.

Kiley, who grew up near Sacramento, attended Harvard University and Yale Law School. A former Teach for America member, he served in the state Assembly for six years before being elected to Congress in 2022 with Trump’s backing. But he has bucked the president, notably on tariffs. He also unsuccessfully ran to replace Gov. Gavin Newsom during the 2021 recall, and has been a constant critic of the governor.

Kiley is now running in a Sacramento-area district represented by Rep. Ami Bera (D-Elk Grove). Democrats in the newly drawn district had a nearly 9-point voter registration edge in 2024. Bera is now running in the new version of Kiley’s district.

In Kiley’s new race, his top rival is Dr. Richard Pan of Sacramento, a former state senator and staunch supporter of vaccinations.

“Kevin Kiley can try to rebrand himself, but voters know his extreme record,” Pan said in a statement. “He has stood with Donald Trump 98% of the time and was named a ‘MAGA Champion.’ The people of this district deserve better than political opportunism disguised as moderation. This race is about who will actually fight for healthcare, public health, and working families. I’ve done that my entire career. Kevin Kiley has not.”