On her Fox News show Saturday, Pirro suggested without evidence that Omar - the first Somali-American and one of the first of two Muslim women elected to Congress - is not committed to upholding US laws because, among other things, she wears an Islamic headscarf. Support for Israel is declining among America's left-wing millennial women of all backgrounds, as well as among Democrats generally.
Controversial statements about Israel by Omar, a freshman Democratic lawmaker, have landed her in hot water with members of both parties.
Pirro questioned whether Omar's wearing a hijab indicated her adherence to Sharia law.
Her comments were widely condemned on the left and right, including by Hufsa Kamal, a producer on Fox News' "Special Report with Bret Baier". Omar is Somali-American and a practicing Muslim who wears a religious head-covering called a hijab.
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"This is not who your party is", Pirro said in the opinion segment (video below).
"We strongly condemn Jeanine Pirro's comments about Rep. Ilhan Omar". They do not reflect those of the network and we have addressed the matter with her directly.
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Accompanying the Fox News' statement was a lengthy response from Pirro in which the former judge claimed her comments were meant to spark debate, not question Omar's American allegiance.
Pirro, in her own statement, said she did not call Omar un-American.
'I invite Rep. Omar to come on my show any time to discuss all of the important issues facing America today'.
Bernie Sanders, Kamala Harris and Elizabeth Warren issued statements denouncing Islamophobic attacks against Omar and highlighting the distinction between anti-Semitism and criticism of Israel. Last week, the House passed a resolution condemning all forms of hate in the aftermath of her comments.
The controversy was set off by the opening statement of Pirro's Saturday night show. Muslims' adherence to Sharia varies in the United States and around the world.
One of the first Muslim women ever elected to Congress, Omar is an outspoken progressive whose politics and personal story have drawn wide notice. As with all major religions, scholars have interpreted the Quran and other religious texts in myriad ways, and Muslims from different sects, regions and countries practice differently and with varying degrees of observance.
Omar has been in the news because of her own comments that some have judged to be anti-Semitic, leading to a debate over how Democrats should publicly address her views.