President Donald Trump said he is sending US border czar Tom Homan to Minneapolis amid a growing outcry over his immigration crackdown that was inflamed last weekend when federal agents fatally shot a US citizen.

Arizona Republicans expressed support for President Trump's immigration crackdown after the fatal shooting of a protester by a federal agent in Minneapolis.

Thousands of people again filled the streets of Minneapolis on Sunday to protest against the surge in U.S. Immigration and Customs Enforcement agents, chanting and waving signs saying: "ICE OUT!"