Speaking at a Republican Jewish Coalition gathering in Las Vegas, Trump said he made the decision during a discussion with his top Middle East peace advisers, including the US ambassador to Israel, David Friedman, and son-in-law Jared Kushner.
In his battle for political survival, Netanyahu has aligned closely with Trump - a troubling tactic for the roughly 75% of American Jewish voters who lean Democratic.
Trump started his speech mocking Omar.
President Donald Trump thanked her for her work in a tweet and announced U.S. Customs and Border Protection Commissioner Kevin McAleenan would be taking over as acting head of the department.
Ironically, trafficking in the dual loyalty charge is what Rep. Ilhan Omar (D-Minn.) has been accused of when she questioned the "allegiance" of Israel supporters in America, suggesting they placed Israel above US interests.
Attendees wear "Trump" yarmulkes before U.S. President Donald Trump speaks at an annual meeting of the Republican Jewish Coalition, Saturday, April 6, 2019, in Las Vegas.
Trump then adopted a deep voice, saying, "I am very fearful for my life, I am very anxious that I will be accosted if I'm sent back home" to impersonate a hypothetical migrant.
"Some of the roughest people you've ever seen, people that look like they should be fighting for the UFC", he said about Ultimate Fighting Championship mixed martial arts promotion company.
Ronda Rousey will disappear after WrestleMania
A couple of matches later, Zack Ryder and Curt Hawkins - two more Long Island natives - won the RAW Tag Team Championships . The battle between Kingston and Daniel Bryan was a gripping one with several signature and finishing moves executed.
The president says "we need more Republicans".
Two protesters were escorted from the venue after briefly interrupting Trump as he began his remarks, chanting, "Jews are here to say; occupation is a plague". "Let's go, so we can win everything". Adelson, 85, has been battling non-Hodgkin's lymphoma, and received a loud ovation when he appeared at the event and took a seat in the front row.
That might seem a false hope after the 2018 midterm elections, when more than 75 percent of Jews voted for Democratic candidates.
His appearance at the Republican Jewish Coalition nearly a month after Democratic Rep. Ilhan Omar came under sharp scrutiny for accusing pro-Israel lawmakers of serving "allegiance to a foreign country." .
In November, Trump recognized Miriam Adelson with the Presidential Medal of Freedom, the highest honour the nation reserves for a civilian.
Trump, who typically demands short, sharp briefings and is known for his colorful retelling of stories, said Friedman was shocked, "like a wonderful, lovely baby", and asked the president if he would actually do it.
Incredibly, Trump took time during his speech to deride Democrats, suggesting they didn't have Israel's interests at heart - doing so while again utilizing the dual loyalty anti-Semitic trope. In mid-March, The Washington Post reported that as many as 240 migrants seeking asylum had been sent back to Mexico since the since the policy was unveiled in January.