Obama night at the DNC: Barack, Michelle rouse crowd for Harris

Former first lady of the United States Michelle Obama speaks Tuesday during Day 2 of the Democratic National Convention in Chicago, Ill. (REUTERS/Brendan Mcdermid)

Former U.S. President Barack Obama takes the stage Tuesday during Day 2 of the Democratic National Convention in Chicago, Ill. (REUTERS/Brendan Mcdermid)

Former U.S. President Barack Obama takes the stage Tuesday during Day 2 of the Democratic National Convention (DNC) in Chicago, Ill. (REUTERS/Brendan Mcdermid)

CHICAGO — Former U.S. President Barack Obama returned to the national stage on Tuesday night to boost his longtime Democratic ally Kamala Harris in her 11th-hour presidential bid against Republican Donald Trump.