Political notebook: Tibbits-Nutt silence | cannabis chief resurfaces | Southie rep race

Transportation secretary says nothing during discussion on new revenues

The former head of the Mass. Taxpayers Foundation told the MBTA board of directors on Thursday that a political coalition is needed to tackle the T’s problems, but the natural leader of such an effort, Transportation Secretary Monica Tibbits-Nutt, who stirred controversy with recent comments about ways to raise revenue, was conspicuously silent during the meeting.