Homeland Security Secretary Markwayne Mullin said his department is "drawing up" plans to stop customs and immigration processing at airports in cities that “don’t want us to enforce immigration.”

Transportation Secretary Sean Duffy broke with Homeland Security: "We shouldn't shut down air travel in a state that doesn't agree with our politics."

Two months into his new role, Homeland Security Secretary Markwayne Mullin finds himself trying to solve a puzzle: How does he deliver on the deportation mandate expected of him…