Boston Mayor Michelle Wu expressed confidence heading into a Congressional oversight committee hearing on sanctuary city policies that she says has been portrayed as a “showdown” by the Republican-led House panel.

Republican congressman James Comer says so-called sanctuary city policies are a nightmare that make American cities more dangerous, as he opens a congressional hearing with Democratic mayors from four

The committee has invited the mayors of Boston, Chicago, Denver and New York City, all Democrats, to explain and defend the laws during a televised hearing at 10 a.m. Some mayors have defended the laws as making all their residents safer.