The mayors of Boston, Chicago, Denver and New York City are prepping for a high-stakes hearing before the House Committee on Oversight and Government. Lawmakers will hear from Mayors Eric Adams (New York City), Brandon Johnson (Chicago), Michelle Wu (Boston) and Mike Johnston (Denver). The hearing, which will take place in front of a full committee, comes as so-called sanctuary cities, jurisdictions that limit cooperation with federal immigration authorities, have come under increasing scrutiny