President Donald Trump’s expansion of executive power, including his unprecedented push to send troops into US cities to combat crime and his attempt to seize control of aspects of the economy, has left Americans uneasy, a new Reuters/Ipsos poll found. The findings suggest that a substantial majority of the public favors limits on presidential power and does not approve of Trump’s efforts to shatter longstanding norms. “President Trump has not convinced most Americans that there is an emergency in this country that requires greatly expanded presidential power to address,” said David Hopkins, a political scientist at Boston College. Over the last few weeks, Trump's administration has taken control of the Washington, DC, police department and deployed National Guard troops to...