(CNN) - Republican Gov. Chris Christie on Monday threw his support behind Sen. Scott Brown, who's running to keep his seat in the highly-contested Senate race in Massachusetts.
"Scott Brown and I share a commitment to taking on today's most difficult challenges by reforming government, balancing budgets and making tough choices," the New Jersey governor said in a statement.
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The endorsement comes as a boost for Brown as he faces a heated campaign against the likely Democratic nominee Elizabeth Warren. Republicans frequently point to Christie, one of the GOP's biggest stars, as an ideal presidential candidate. Christie, however, has repeatedly shot down the idea and backs Mitt Romney for president.
"(Brown) is battling to bring the same kind of fiscal discipline to Washington that I am fighting for in New Jersey," Christie said. "Scott cuts through the baloney and calls the issues like he sees them, and I am proud to endorse his campaign."
Recent polls show Brown with a slight advantage over Warren, who served as President Barack Obama's adviser in the formation of the Consumer Financial Protection Bureau.
Both candidates have seen heavy fundraising pulls in recent months, with Warren outpacing Brown in the last quarter $5.7 million to Brown's $3.2 million
Political handicappers Charlie Cook and Stuart Rothenberg each rank the race as a toss-up.
Brown first won the Senate seat in a closely-watched special election in 2010, following the death of Sen. Ted Kennedy.