Sen. John McCain gave a key endorsement to Massachusetts Sen. Scott Brown, who is locked in a very close fight with Democrat Elizabeth Warren.
McCain, the GOP's 2008 presidential nominee, praised Brown's 32 years of service in the National Guard in a video message.
"Scott understands that our freedoms are preserved by a strong military and our number one priority is keeping Americans safe at home and abroad," McCain said.
McCain made the endorsement very current, citing the deaths this week of four U.S. diplomatic personnel in Libya. He also referred to protests against U.S. embassies across the Muslim world over an anti-Islamic film in his remarks supporting Brown.
"Scott understands the challenges we face and he has the experience, wisdom and temperment to influence the choices our nation makes," McCain said.
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