Warren has been highly critical of the Trump administration. She has expressed concerns over what she says are Trump's conflicts of interest. The Presidential Conflicts of Interest Act, written by Warren, was first read in the Senate in January 2017. In November 2018 Warren said she would not vote for Trump's United States–Mexico–Canada Agreement (USMCA): "It won't stop outsourcing, it won't raise wages, and it won't create jobs. It's NAFTA 2.0." She has also said she believes USMCA would make it harder to reduce drug prices because it would allow drug companies to lock in the prices they charge for many drugs. Warren has been highly critical of Trump's immigration policies. In 2018 she called for abolishing U.S. Immigration and Customs Enforcement (ICE). Warren has criticized U.S. involvement in the Saudi Arabian-led intervention in Yemen in support of Yemen's government against the Houthis.