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Massachusetts Governor Charlie Baker.

Craig F. Walker/Globe Staff

Charlie Baker may be the country’s most popular governor, but he remains something of an enigma

The most popular governor in the nation begins his second four-year term Thursday. But what do we really know about Baker and what drives him?

Students Erickson Alves (left) 22, and Sonilisa Cardoso 21. They are in danger of aging out of the Boston Public School system before graduating.

BPS to boot older students from high school

Officials this year are taking a hard-line approach in enforcing a policy that calls for ejecting students from school on their 22nd birthday — an edict they had routinely ignored in the past.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2019/01/02/BostonGlobe.com/Metro/Images/Walker_010219_02buslanepic_7143x.jpg Boston’s new bus-only lanes are an improvement. But who will pay for them?

The city and state are debating who is responsible for maintaining such additions to the roads — the state-run transit agency that owns the buses or the city that owns the streets?

National Grid, union reach tentative agreement to end lockout

National Grid and the United Steelworkers reached a tentative agreement to end a six-month lockout of 1,250 union workers, the utility and the unions announced late Wednesday night.

Cyclists on the National Mall passed piles of trash left uncollected because of the partial government shutdown.

Trump and Democrats dig in after contentious talks to reopen government

A White House meeting yielded no agreement on a way to break an impasse over Trump’s demands for billions of dollars for a border wall.

FILE -- Mitt Romney, the incoming Republican senator from Utah, at the Capitol in Washington on Nov. 13, 2018. Romney’s biting critique that President Donald Trump “has not risen to the mantle of the office” touched off a series of counterattacks from Trump’s allies Wednesday, Jan. 2, 2019. (Erin Schaff/The New York Times)

Mitt Romney’s latest anti-Trump broadside raises question: What kind of senator is he going to be?

Official Washington was buzzing with chatter about whether Romney will use the power of the Senate to try to restrain Trump or limit his criticism to expressions of regret and sorrow.