Republican Gov. Jan Brewer faces one of the toughest fights of her political career as she bucks her own party in an effort to expand Medicaid to about 300,000 more poor people.
And the expansion comes under President Barack Obama's health care overhaul.
Brewer had been a hard-line opponent of the federal law, and her decision to comply has turned allies into foes. There is even talk of lawsuits to stop her.
Meanwhile, Democrats are supporting the governor after years of sparring with her at every turn.
Brewer previously joined several other Republican-led states in a legal challenge that failed last year before the U.S. Supreme Court to have the law turned back as unconstitutional.
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