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Texas Gov.聽Rick聽Perry聽will abandon his presidential bid and endorse Newt Gingrich, two Republican officials said Thursday, just two days before the pivotal South Carolina primary and as Republican front-runner Mitt Romney struggles to fend off a new challenge from the former House speaker.

Perry聽scheduled a news conference Thursday morning in South Carolina to announce his decision.

The officials spoke on the condition of anonymity to avoid pre-empting the announcement.

Perry聽has faced calls to drop out of the race to compel conservative voters, whose support has been divided among several conservative candidates, to rally behind Gingrich in hopes of stopping Romney. Recent polls show Gingrich gaining steam heading into Saturday's contest, but he still trails Romney by about 10 percentage points.

Romney has benefited so far from having several challengers who are considered more conservative than him competing for the same segment of voters.

Perry聽entered the race last August to great fanfare and high poll numbers. But his standing quickly fell after a series of mistakes called into question whether the Texas politician, who had never lost a race during his three-decade career in elected office, was ready for the national stage.

Perry's聽biggest error came in a nationally televised debate in early November, when he could not remember the name of the third Cabinet department he pledged to eliminate.

"Oops," he said. Making fun of himself afterward, he told reporters: "I stepped in it."