The U.S. Attorney General has announced plans to withhold funds from so called "sanctuary cities" causing reaction around the country.

FOX's Jessica Rosenthal reports:

California's Senate President said the Attorney General's statement is nothing short of blackmail. He hinted at legal action, calling this a gun to the head method to force cities and counties to participate in mass deportations that he says is unconstitutional and will fail, adding that sanctuary policies make cities and counties safer.

San Francisco's mayor says their sanctuary laws are already in compliance because if the federal government wants to detain a serious criminal they can obtain a warrant, which the city honors.

New York's Attorney General issued a statement saying local governments actually have broad authority to not participate in immigration enforcement. 

Jessical Rosenthal, FOX News.

Follow Jessica Rosenthal on Twitter: @JessicaFOXNews