Boston Mayor Michelle Wu said Tuesday that the city is still determining how to respond to a call from congressional Republicans for her and other Democratic mayors to appear at a Capitol Hill hearing to discuss their local immigration policies.

President Trump’s pick to head the Transportation Department, after the White House budget office issued a memo Monday evening pausing large swaths of federal funding, which Democrats warned would plunge the nation in chaos.

Boston Mayor Michelle Wu has been asked to testify at a Congressional hearing as part of a federal investigation into sanctuary cities.