Clinton and Trump look to pull away from rivals

Voters in a host of states are heading to polling places and caucus sites on the busiest day of the 2016 primaries.

Bernie Sanders waved as he left a news conference after voting in Vermont.

Jacquelyn Martin/associated press

Bernie Sanders departed a news conference after voting in Vermont.

Marco Rubio shook hands with supporters at an appearance in Minnesota.

CRAIG LASSIG/european pressphoto agency

Marco Rubio shook hands with supporters in Minnesota.

Hillary Clinton listened to a man while meeting people at Mapps Coffee in Minnesota.

JONATHAN ERNST/REUTERS

Hillary Clinton listened to a man at a coffee shop in Minnesota.

A volunteer wore a button in support of Hillary Clinton in Texas.

Ron Jenkins/getty images

A volunteer wore a Hillary Clinton button in Texas.

Ted Cruz spoke to the media after casting his vote in Texas.

TRISH BADGER/reuters

Ted Cruz spoke to the media after casting his vote in Texas.

Two-month-old Steven Burke wore a sticker supporting Ted Cruz.

Pat Sullivan/associated press

Two-month-old Steven Burke wore a sticker supporting Ted Cruz.

John Kasich listened to his introduction at a town hall rally in Virginia.

GARY CAMERON/reuters

John Kasich listened to his introduction at a rally in Virginia.

A girl wore a t-shirt with an image of Ronald Reagan, and a John Kasich sticker, in Virginia.

GARY CAMERON/reuters

A girl wore a Ronald Reagan t-shirt and a John Kasich sticker in Virginia.

Marco Rubio supporters waited for him to speak in Minnesota.

Stephen Maturen/getty images

Marco Rubio supporters waited for him to speak in Minnesota.

A Bernie Sanders supporter in London, England, sported buttons on Super Tuesday.

Ben Pruchnie/getty images

A Bernie Sanders supporter in London, England, sported buttons.

Donald Trump stood alongside Chris Christie and waved to a crowd in Ohio.

AARON JOSEFCZYK/reuters

Donald Trump stood with Chris Christie in Ohio.

A supporter looked on as he waited for Donald Trump to speak in Ohio.

AARON JOSEFCZYK/reuters

A supporter waited for Donald Trump to speak in Ohio.

Former President Bill Clinton greeted people inside the Newton Free Library, a polling place, during Tuesday?s primary election.

Did Bill Clinton violate election rules in Mass.?

While stumping for his wife, Bill Clinton entered a polling station at the Holy Name gymnasium in West Roxbury.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/03/01/BostonGlobe.com/Metro/Images/slider4.jpg Voters head to the polls in Mass.

Turnout is said to be heavy in Massachusetts in a potentially pivotal Super Tuesday.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/03/01/BostonGlobe.com/Politics/Images/111111112016-02-28T020358Z_1597095605_TB3EC2S05QBH0_RTRMADP_3_USA-ELECTION-TRUMP.jpg Manchester newspaper regrets Chris Christie endorsement

A New Hampshire Union Leader editorial said endorsing the New Jersey governor was a ?bad choice.?

Boston hospitals report births of Leap Day babies

A number of ?Leap Day babies? were born at Boston area hospitals on Monday, gaining an unusual birthday and a lifetime conversation starter.

Bellingham brothers ransacked home with body in it, police say

The two brothers allegedly broke into a home, found the resident dead, and ransacked it, stealing checks, TVs, and copper piping.

Sponsored by Rockland Trust

When it comes to business, insurance means assurance

To protect your business, you?ll want to have the right insurance coverage in place. Find out what kind of coverage your business needs.

This content was produced by Boston Globe Media in collaboration with the advertiser. The news and editorial departments of The Boston Globe had no role in its production or display.

Officials examined the train in December as it sat in a South Boston maintenance facility.

Jessica Rinaldi/Globe Staff

Runaway Red Line driver had prior safety violations

The Red Line driver whose train took off without him had violated MBTA rules 13 times before, including 5 safety violations, according to a new report.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/03/01/BostonGlobe.com/Lifestyle/Images/507490828.jpg ?Making a Murderer? defense attorneys take show on the road

Dean Strang and Jerry Buting, the lawyers on the Netflix true-crime series, will appear in Boston in April.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/20/BostonGlobe.com/BCOM/Images/2014-05-03T132933Z_922580086_GM1EA531NMJ01_RTRMADP_3_VATICAN-ABUSE%20-%20Copy-5990.jpg Cardinal O?Malley lauds role ?Spotlight? played in exposing clergy sex abuse

The Boston cardinal issued a statement Tuesday after the film?s Oscar win Sunday night.

Longtime leader of Boston Ski & Sports Club dies

Over the decades, Eugene Brezniak worked out logistics for more excursions than he could count.

Kieran Feldman, 7, contemplated additional toppings as he took a bite of his cone at Dorchester?s Ice Creamsmith.

David L. Ryan/Globe Staff

The Ice Creamsmith in Dorchester celebrates 40 years

Some customers who came in were surprised to see city officials, including Boston Mayor Martin Walsh, on hand for the anniversary.

commentary

Why Twitter?s viral ?trap covers? of pop hits resonated

Behind the funny videos is a real critique of disrespect for black artists, says creator James Kirk.

Dining Out

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/02/28/BostonGlobe.com/Lifestyle/Images/02dining10.jpg Tourist trap or living history? A review of Union Oyster House

Is history enough to carry ?America?s Oldest Restaurant? into the future? Evidently.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/02/28/BostonGlobe.com/National/Images/ab0096b5149b4d6989772d1b27efc0a1-ab0096b5149b4d6989772d1b27efc0a1-0.jpg Scott Kelly checks out of ISS

The NASA astronaut and his Russian counterpart are expected to land in Kazakhstan on Wednesday after spending nearly a year in space.

THOMAS FARRAGHER

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/03/01/BostonGlobe.com/Metro/Images/farragher-10882.png Sha Na Na sax man leaves a legacy of doo-wop memories

Lennie Baker ? cantankerous and hilarious ? remained a son of Whitman even as his group Sha Na Na gained fame.

Ground Game

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/02/25/BostonGlobe.com/Metro/Images/capitalcruz.jpg Ted Cruz?s delegate math problem

To win the nomination, Cruz will have to go from having 5 percent of GOP delegates to more than 50 percent in three months.

The Big Picture

Scott Kelly?s year in space

NASA astronaut Scott Kelly captured views of our planet that unify science and art.

Globe investigations

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/18/BostonGlobe.com/Metro/Images/spotlight150x150-165.jpg Globe investigations and Spotlight reports

A look at high-impact investigations from The Boston Globe, including the Pulitzer Prize-winning report on abuse in the Catholic Church.

BetaBoston

BETABOSTON

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/02/29/BostonGlobe.com/Business/Images/2016-02-29/AMS_Drone.jpg Robot maker gets funds for solar sea vessel

Autonomous Marine Systems makes a solar- and wind-powered crafts that can spend days alone.

The story behind 'Spotlight'

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/18/BostonGlobe.com/Metro/Images/spotlight-9497.jpg Boston Globe coverage and the movie ?Spotlight?

?Spotlight? is based on the stories and the reporters behind the investigation of sexual abuse in the Catholic Church.

Crux

JOHN L. ALLEN JR. | ALL THINGS CATHOLIC

//c.o0bg.com/rf/image_90x90/Boston/Production/BostonGlobe.com/WebPages/Homepage/Components/allen-189.jpg An Australian lesson in telling the whole Catholic story

There are salt-of-the-earth folks, who quietly carry out a staggering variety of good works.