The bipartisan U.S. House Committee on Oversight and Government Reform sent a letter to Denver Mayor Mike Johnston asking him to testify. Johnston didn't say if he would but criticized Republicans in Congress on immigration.

Denver Mayor Mike Johnston is one of four big city mayors called by congressional Republicans to testify at a hearing next month on so-called “sanctuary city” policies. Plans for the hearing, scheduled for Feb.

Denver's mayor, police and chief prosecutor are standing firm against working with federal immigration authorities to fulfill President Trump's controversial deportation plan. Why it matters: The U.S.