America’s next big showdown is brewing over Donald Trump’s zeal to impose unusual presidential power as he eyes big, Democratic-run cities to expand a crime crackdown that sent troops flocking onto the streets of Washington,

President Donald Trump declared his crime crackdown in the nation's capital a success on Thursday as he visited federal officers deployed under his plan, which has drawn resident complaints that its tactics are too heavyhanded.

WASHINGTON (Reuters) -Hundreds of National Guard soldiers in military fatigues and combat boots mingled with tourists, posed for selfies, and treated themselves to ice cream from food trucks on Thursday along Washington's National Mall,