McCain defeats conservative primary challenger

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Sen. John McCain has defeated conservative challenger J.D. Hayworth in the Republican primary in his bid for a fifth term.

McCain faced an aggressive challenge from Hayworth two years after his tough loss in pursuit of the White House. Hayworth attempted to tap into anti-incumbent rage that has taken down other lawmakers this year while hammering the longtime senator on immigration.

McCain responded by spending nearly $20 million through Aug. 4 and taking a harder stance on border issues amid the debate over the controversial immigration law in Arizona.

McCain now begins a final 10-week push in what could be his last campaign. He will be heavily favored over the Democrat.