President Donald Trump is in Iowa Tuesday, pushing his economic message ahead of the midterms.

White House border czar Tom Homan and Minnesota Gov. Tim Walz met Tuesday morning and agreed to maintain an ongoing dialogue. Meanwhile, the Department of Homeland Security says it’s investigating a woman who allegedly attempted to buy a gun to “kill ICE agents.”

Extreme cold warnings remain in effect for about 175 million people nationwide, with another blast of Arctic air expected to move from the Plains into the east and southeast from Friday into Saturday.