GUATEMALA CITY — U.S. Homeland Security Secretary Alejandro Mayorkas said Thursday that a Texas law giving state authorities the power to arrest and deport migrants who have entered the country illegally is unconstitutional.

       Mayorkas spoke during a joint news conference with Guatemala President Bernardo Arévalo in the Guatemalan capital.

       “It is our strongly held view as a matter of law that SB4 (the ...

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