Can America's Left start its own Tea Party?

Across the country, protesters are calling on Democrats to obstruct the Trump Administration wherever they can. In the US Senate, Elizabeth Warren and others have got the message, and they’re defying Republicans by attacking Trump’s nominee for Attorney General. But how long can the political energy be sustained — especially when Republicans complain that they’re in danger at town halls when demonstrators turn on them. Is a so-called "resistance" movement at risk of alienating the supporters it needs most to accomplish political change?