Open this photo in gallery: U.S. President Donald Trump speaks to the media on board Air Force One on the way to Miami on April 12.Nathan Howard/Reuters U.S. President Donald Trump’s public approval rating edged down to its lowest level since his return to the White House, as Americans showed signs of wariness over his efforts to broaden his power, a Reuters/Ipsos poll that closed on Monday found. Some 42% of respondents to the six-day poll approved of Trump’s performance as President, down from 43% in a Reuters/Ipsos poll conducted three weeks earlier, and from 47% in the hours after...