U.S. PRESIDENT GEORGE W. BUSH, WARNED THE U.S. CONGRESS AGAINST FEARMONGERING ON MONDAY AS THE SENATE TACKLED IMMIGRATION REFORM, AN ISSUE THAT HAS SPLIT HIS REPUBLICAN PARTY AND SPURRED HUGE PROTESTS, REUTERS REPORTED. 'THE IMMIGRATION DEBATE SHOULD BE CONDUCTED IN A CIVIL AND DIGNIFIED WAY,' BUSH SAID, PUSHING HIS OWN PROPOSALS AT A SWEARING-IN CEREMONY FOR 30 NEW AMERICAN CITIZENS. WITH HIS JOB APPROVAL RATING AT THE LOWEST OF HIS PRESIDENCY, BUSH FACES A NEW TEST OF HIS POLITICAL STRENGTH ON THE DIVISIVE IMMIGRATION ISSUE. 'NO ONE SHOULD PLAY ON PEOPLE'S FEARS OR TRY TO PIT NEIGHBORS AGAINST EACH OTHER,' HE SAID. 'NO ONE SHOULD PRETEND THAT IMMIGRANTS ARE A THREAT TO AMERICAN IDENTITY, BECAUSE IMMIGRANTS HAVE SHAPED AMERICA'S IDENTITY.'