Republican presidential John McCain assured Hispanic leaders he would push through Congress legislation to overhaul federal immigration laws if elected, several people who attended a private meeting with the candidate said Thursday. Democrats questioned why the Arizona senator held the meeting late Wednesday night in Chicago. But supporters who were in the room denied that McCain held the closed-door session out of fear of offending conservatives, many of whom want him to take a harder line on immigration. Both McCain and Democratic presidential candidate Barack Obama support giving legal status to millions of illegal immigrants, but neither has made the issue a centerpiece of the campaign. At one time, McCain's campaign suffered because of his stance on the issue. "This was not a secret meeting," said Rafael Rivadeneira, a vice chairman of the Republican National Hispanic Assembly of Illinois, who was among more than 150 Chicago-area Hispanic leaders who attended. "There was nothing he said that they wouldn't want people to hear."