16 states led by New York and California are taking legal action to stop President Trump's partial ban on immigration.
The move came as protests grow, with some demonstrators gathering at the White House to express their fury over the weekend's developments.
And there's still widespread confusion about the precise restrictions the US President has authorized, as our Washington Correspondent Simon Marks reports.
IN: NATSOUND
OUT: SOC
DUR: 30 seconds
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ARN: http://www.fsnradionews.com/feeds/0129challenges-sm-arn.mp3
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