San Francisco and a handful of other US cities are suing the Trump administration over its move to block funding for local governments with “sanctuary” policies as the president cracks down on undocumented immigrants.

Some local officials are pushing back against the federal government’s assertion that they must help ICE with its deportation campaign.

A coalition of U.S. cities and counties on Friday filed a lawsuit challenging President Donald Trump's executive order seeking to force so-called sanctuary jurisdictions to cooperate with his immigration crackdown and mass deportations.