One of the nation's largest Latino advocacy and civil rights organizations plans to meet in Los Angeles this weekend to instruct people how to mobilize and vote out those who fail to back generous new immigration laws. The National Council of La Raza will highlight immigration at its annual conference beginning today, featuring a bipartisan lineup of such high-profile speakers as former President Clinton, Republican presidential political strategist Karl Rove, Gov. Arnold Schwarzenegger and Los Angeles Mayor Antonio Villaraigosa. The conference comes as the two chambers of Congress hold competing summer hearings on the issue, with the House stressing stronger...