Bernie Sanders declining to help son in race fits pattern

MONTPELIER, Vt. — An endorsement by Bernie Sanders is one of the most coveted gifts in Democratic politics. But the Vermont senator and liberal darling is notoriously reluctant to back many politicians, including, it turns out, his own son.Sanders has come under scrutiny in recent weeks for not publicly endorsing his son, Levi, in his race for a New Hampshire congressional seat. But people who know him say Sanders, a potential top-tier contender for the 2020 Democratic presidential nominee