WASHINGTON (AP) — Sen. Elizabeth Warren on Monday took the first major step toward launching a widely anticipated campaign for the presidency, hoping her reputation as a populist fighter can help her navigate a Democratic field that could include nearly two dozen candidates.

PHOENIX (AP) - Democrat Kyrsten Sinema won Arizona's open U.S. Senate seat Monday in a race that was among the most closely watched in the nation, beating Republican Rep. Martha McSally in the battle to replace GOP Sen. Jeff Flake.