The Republican from Greenwich who narrowly lost to Gov. Dannel P. Malloy in 2010 announced his decision Wednesday at a VFW post in Waterbury.
Foley, a former U.S. ambassador to Ireland, spent more than $10 million of his own money on his losing bid in 2010.
His running mate from the last race, Danbury Mayor Mark Boughton, has already joined the field of Republican candidates that also includes Senate Minority Leader John McKinney.
Boughton, a seven-term mayor, announced his candidacy earlier this month, saying he believes Connecticut residents are not “getting their fair share of the American dream.”
Malloy has yet to announce whether he will seek a second term.
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