As grassroots support for the pro-immigration reform March for America grows, anti-immigration groups and their allies are trying to use racial tension to stop the momentum. Opposition groups like NumbersUSA and the Americans for Legal Immigration PAC announced plans this week to partner with Tea Party activists in response to the event, which is expected to draw as many as 100,000 people to the National Mall on March 21.

Their hope? To scare the public into opposing a pathway to citizenship for the estimated 12 million undocumented immigrants living in the United States.