It may seem like a bad sign for Romney, who spends a lot of time in NH and has a house there, but, given the track record of the Union Leader, may be Gingrich should be worried.
http://www.washingtonmonthly.com/political-animal/2011_11/union_leader_backs_gingrich_in033724.php?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+washingtonmonthly%2Frss+%28Political+Animal+at+Washington+Monthly%29
Does the recipient of the Union Leader’s endorsement generally go on to win the state’s primary? Looking back, the track record is mixed:
1976: The paper endorsed Ronald Reagan over Gerald Ford, but Reagan lost
1980: Reagan won the endorsement and the primary
1988: The Union Leader supported Pete du Pont, who finished fourth in the primary
1992: The paper supported Pat Buchanan, who finished a competitive second against an incumbent president
1996: The Union Leader again backed Buchanan, who this time won the primary
2000: Steve Forbes won the paper’s endorsement, in advance of a third-place showing
2008: The Union Leader supported John McCain, who won the state’s primary
Only yjree yo,es in the last 30 years did they pick the winner of the primary on the Repunlican side, and only two of them ended being the nominee.