WILLIAMSBURG, Virginia (Reuters) - President George W. Bush is scheduled to hold a news conference on Saturday with House Speaker Nancy Pelosi (news, bio, voting record) after he addresses a meeting of House Democrats, congressional aides said on Friday. Bush will speak to House of Representatives Democrats holding an annual weekend retreat at about 10 a.m. (1500 GMT). Afterward, at about 11:40 a.m. (1640 GMT), Bush, along with Pelosi and other House Democratic leaders, will answer reporters' questions. Bush, a Republican, will be appearing at the Williamsburg retreat one month after Democrats took control of the House and Senate. With...