Over the last several years, May Day rallies in the United States have been dominated by activists pushing for a path to citizenship for the estimated 11 million people in the country illegally.
But since 2006, the rallies have gotten smaller, less focused and increasingly splintered by any number of groups with a cause.
In New York, Los Angeles, San Francisco and Oakland, Calif., May Day protests on Tuesday were dominated by Occupy Wall Street activists. That's a sign of how far the immigration has fallen off the radar.
And yet activists acknowledge the threat to illegal immigrants may be stronger than ever with the U.S. Supreme Court considering Arizona's controversial crackdown.