Republicans accused the mayors of New York, Chicago, Denver and Boston of providing sanctuary to criminals, while Democrats pointed to falling crime rates and defended helping the needy.

Here's a rundown of several key claims made during the hearing, and our reporting on the issues and numbers referenced by officials.

Mayor Michelle Wu “expects to pay” up to $650,000 in city funds to prepare for a high-stakes congressional hearing on sanctuary cities and is bringing along a dozen staff members at an additional cost of $8,

Rep. Paul Gosar clashed over immigration with big city Democratic mayors in a congressional hearing, going as far as to quiz them on Arizona’s controversial Senate Bill 1070 law. The House Committee on Oversight and Government Reform hearing,

Republicans put Democrats in the hot seat as they continue to try and win the messaging wars on immigration policy.

Mayor Michelle Wu touted Boston as the “safest major city” in the country and took a swipe at the federal administration for spreading fear and undermining police work in her opening remarks

Mayors of four of the largest cities in the U.S. appeared before lawmakers in the U.S. House of Representatives on Wednesday to defend their so-called "sanctuary city" laws, which restrict local officials in helping enforce federal immigration regulations.

"Migrants did not bring a wave of crime to Denver." Mayors of several large cities defended their policies in front of the House Oversight Committee.

She stood up for the city and refused to cower in the face of threats and smears,” one of more than 1,700 respondents said. The post Mayor Michelle Wu represented Boston well at the ‘sanctuary cities’ congressional hearing,

President Trump has said he wants to put an end to so-called sanctuary cities and deport millions of immigrants in the U.S. illegally. WSJ sat down with local city officials pushing back on those plans.