Time Magazine has a somewhat biased blurb about Arizona's Prop. 200. They even use the phrase "anti-immigrant", just like the Arizona Republic. Nevertheless, it contains this interesting bit:

...The measure could affect the presidential race in a state where Bush and Kerry are running neck and neck. Some opponents hope it will galvanize Hispanic voters, which could boost Kerry's chances. Yet the Hispanic vote is hardly monolithic. Many of Arizona's Latino families - one-quarter of the state's population - have lived there for generations and are unhappy with undocumented workers who drive down wages. Democratic canvassers in Latino neighborhoods have been told to stress jobs, education and health care - and not to discuss the initiative unless asked.