WASHINGTON -- A new lawsuit filed Wednesday by a free speech watchdog takes aim at the key legal foundations that the Trump administration has relied on to arrest and attempt to deport foreign students over their criticism of the Israeli government.

The challenge, filed in California, goes further than other lawsuits that have targeted the student arrests. The new suit focuses on a section of immigration law that allows the secretary of state to determine that a noncitizen poses a threat to the country's foreign policy and can be removed from the country for that reason. It argues that it is unconstitutional to invoke the provisions for speech and other activities protected by the First Amendment.

Lawyers from the free speech group, the Foundation for Individual Rights and Expression, br

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