Connecticut Sen. Joe Lieberman, the Democratic Party's vice presidential candidate in 2000 and now an independent who is one of John McCain's strongest supporters, will speak at the Republican National Convention, an official said. Lieberman will deliver a speech when Republicans gather in St. Paul, Minnesota, to nominate McCain for president, a party official told The Associated Press on Wednesday. The official requested anonymity because a formal announcement had yet to be made. Lieberman's office declined to comment. Lieberman, 66, caucuses with Senate Democrats. The four-term senator has angered many Democrats with his strong support for the Iraq war and for backing McCain's bid for the White House.