Mitt Romney wins hard fight in Mich., cruises in Ariz.

The narrow win in the the Michigan primary — coupled with another victory in Arizona — gives Romney crucial momentum heading into Super Tuesday next week.

Mitt Romney greeted supporters as he and his wife, Ann, arrived at a rally in Novi, Mich.

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Mitt Romney greeted supporters as he and his wife, Ann, arrived at a rally in Novi, Mich.

Rick Santorum thanked supporters in Grand Rapids, Mich.

Joe Raedle/Getty Images

Rick Santorum thanked supporters in Grand Rapids, Mich.

Volunteer Vicki Groff set up a sign outside a school in Phoenix, Arizona yesterday.

Joshua Lott/REUTERS

Volunteer Vicki Groff set up a sign outside a school in Phoenix, Ariz., yesterday.

Mitt Romney and his wife, Ann, looked at an old campaign hat worn by his father, George, in Livonia, Mich., last night.

JUSTIN SULLIVAN/GETTY IMAGES

Mitt Romney and his wife, Ann, looked at an old campaign hat worn by his father, George, in Livonia, Mich., last night.

John Vandermark wore a sticker declaring

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John Vandermark wore a sticker declaring "I Voted" in Royal Oak, Mich.

Rick Santorum greeted diners at the Rainbow Grill in Grandville, Mich.

SCOTT OLSON/GETTY IMAGES

Rick Santorum greeted diners at the Rainbow Grill in Grandville, Mich.

A voter in  Royal Oak, Mich., filled out her primary ballot.

Joe Raedle/Getty Images

A voter in Royal Oak, Mich., filled out her primary ballot.

A Ron Paul supporter watched the motorcade for Rick Santorum drive away following a campaign stop at a Grandville, Mich., restaurant.

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A Ron Paul supporter watched the motorcade for Rick Santorum drive away following a campaign stop at a Grandville, Mich., restaurant.

NEWS ANALYSIS

Super Tuesday knockout punch appears unlikely

Even though 437 delegates are up for grabs next Tuesday, by far the biggest haul of the season, it is probable no clear-cut winner will emerge.

Three-term US Senator Olympia Snowe, a Republican, said she had felt confident she could win another term.

Olympia Snowe shocks GOP with decision not to run

Snowe, a moderate Republican senator from Maine known for her ability to work across party lines, announced she will not seek reelection this fall.

Mashpee tribe would put a casino in Taunton

The Mashpee Wampanoag Indian tribe has chosen land in Taunton as the site for its long-sought tribal casino, according to a person close to the tribe.

“Don’t have him tomorrow!’’ people told Hamilton’s Elena Moreira, whose son, Andreas, was born on leap day in 2008.

Essdras M Suarez/Globe Staff

For leapers, Feb 29 birthdays well worth the wait

For those born on leap day, occasional inconveniences are outweighed by having a special birthday, and for always being much younger then their peers.

Mormons baptized slain reporter Daniel Pearl

Members of the Mormon Church have posthumously baptized Pearl, a Wall Street Journal reporter killed by terrorists in Pakistan shortly after the Sept. 11, 2001, attacks.

Northampton hospital, MGH to pursue merger

The deal could send more Cooley Dickinson patients to Boston for treatment, boosting Mass. General traffic at a time when it is under pressure from lower-cost competitors.

“We didn’t win by a lot but we won by enough, and that’s all that counts.”

Mitt Romney,  on the Michigan primary

Globe Insiders

Globe Insider Event | March 5, 5:30 p.m.

http://c.o0bg.com/rf/image_90x90/Boston/2011-2020/2012/02/17/BostonGlobe.com/Special/Images/508746086[1]--90x90.jpg ‘The Real Romney’

Globe editorial page editor Peter S. Canellos moderates a discussion with Globe writers Scott Helman, Scot Lehigh, and Frank Phillips on the Republican presidential candidate.

Metro

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Three miles away, a world from home

Tenants of a Chinatown apartment building closed by city officials amid fears it was structurally unsound are facing challenges after their move to new residences in South Boston.

Business

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Politics

POLITICAL NOTEBOOK

Republican presidential candidate Rick Santorum spoke to supporters at an election night rally in Grand Rapids, Mich., last night.

Clergy, others rip Santorum views on church-state roles

Rick Santorum has angered religious leaders for his comments denigrating JFK’s famous speech calling for a clear delineation between church and state.

Nation & World

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Sheriff’s deputies led T.J. Lane, 17, to court in Chardon, Ohio, yesterday. The teen is accused in a shooting rampage Monday in a high school cafeteria.

Ohio DA says shooter ‘not well’

The teen accused of killing three students in a shooting rampage in a high school cafeteria chose his victims at random and is ‘‘someone who’s not well,’’ a prosecutor said yesterday.

Sports

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Celtics 86, Cavaliers 83

Kyrie Irving scored 24 points, but tight defense by Ray Allen and Rajon Rondo helped the Celtics rally in the fourth quarter.

Celtics snap losing streak

Despite an up-and-down performance all night, the Celtics were able to beat the Cavaliers, 86-83, and snap a five-game losing streak.

Food & dining

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Jeremy Sewall, chef and co-owner of Island Creek Oyster Bar, led a seminar there last month  titled “Know Your Fish.’

Why chefs are confused about what fish they can serve

If you want to see Boston chefs get hot under the collar, throw their hands up in confusion, or sigh in resignation, just ask them about seafood sustainability.