The Milwaukee Journal-Sentinel first contacted the Republican governor's office after discovering two of Taylor Palmisano's tweets from 2011.
"I will choke that illegal mex cleaning in the library. Stop banging (expletive) chairs around and turn off your Walkman," she tweeted May 9, 2011.
"This bus is my worst (expletive) nightmare Nobody speaks English & these ppl dont know how 2 control their kids #only3morehours #illegalaliens," she wrote in January, 2011.
“Taylor Palmisano has been immediately removed from her position with the Friends of Scott Walker campaign,” Walker's rep said in a statement. “Both the Governor, and the campaign, condemn these insulting remarks which do not reflect our views in any way.”
"I deeply regret these offensive and irresponsible remarks," Palmisano said in a statement. "I sincerely apologize, and understand the consequences of making such unacceptable statements."
She has since deactivated her Facebook and Twitter accounts.
This marks the second time this year Walker has had to fire a staffer over social media comments about illegal immigrants. In August, he fired Steven Krieser, his appointee to the state Department of Transportation, over a Facebook post comparing undocumented workers to "Satan."