The New Hampshire Union Leader’s endorsement of Republican presidential candidate Newt Gingrich on Sunday boosts the candidate, who has already seen a steady rise in the polls. It also may signal that former Massachusetts governor Mitt Romney is not a lock to win the Jan. 10 primary.

The editorial, which ran on the paper’s front page Sunday, attributed the decision to endorse Gingrich to his record as speaker of the House and demonstrated ability to work across the political aisle despite ideological differences.

“Newt Gingrich is by no means the perfect candidate,” the editorial said. “But Republican primary voters too often make the mistake of preferring an unattainable ideal to the best candidate who is actually running. In this incredibly important election, that candidate is Newt Gingrich.”