President Donald Trump cut short Kristi Noem’s tenure at the Department of Homeland Security after weeks of internal turmoil. Now headed to a new envoy post, the onetime conservative star faces a pressing question: Can she stage a political comeback? Noem was fired as the nation’s immigration chief after a turbulent stretch marked by internal clashes and two contentious congressional hearings where even some Republicans pressed her over...

Debate on Capitol Hill continues to rage over whether President Donald Trump started a “war” with the strikes he carried out against Iran last weekend, a key consideration for whether the president must look to Congress for authority to continue Operation Epic Fury. Where Republicans see a narrowly-tailored attack designed to prevent a U.S. adversary from securing nuclear capabilities, Democrats see a conflict that could easily spill into...