At least 59 Americans traveled to Syria to join ISIS, according to the George Washington University Program on Extremism. Of the Americans captured, nearly all the men have been repatriated, but at least 13 women and their children have not.

Response: A spokesman for the State Department on Tuesday described the situation as “extremely complicated.” An official with the George Washington program said there were “thousands of legitimate reasons to question the sincerity” of those asking to return.

Related: The British government has told the family of Shamima Begum, 19, who traveled to Syria four years ago to marry an ISIS militant, that it intends to revoke her citizenship, according to a family lawyer.

U.S. wants California to return high-speed rail money

The Trump administration said on Tuesday that it was exploring legal options to get back $2.5 billion in federal funds spent on the state’s high-speed rail network, and also terminating a $929 million grant.

Gov. Gavin Newsom, who scaled back plans for the project last week, accused the administration of retaliating for California having joined a lawsuit challenging President Trump’s emergency declaration on the southwestern border.