President Bush is set to announce a sweeping overhaul of the nation’s immigration laws that would give legal status to millions of undocumented workers who have jobs in the country. The proposal is expected to face harsh opposition in Congress from fellow Republicans who say the law would give amnesty to people who have broken the law by entering the country illegally. Bush’s plan was calibrated by his chief advisor Karl Rove. It is seen as an attempt by the Bush administration to reach out to Latino voters. Half of the roughly 8 million undocumented workers in the United States are Mexican. The proposal comes less than a week before Bush goes to Mexico to meet President Vicente Fox, who has advocated such changes.