Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: "There 's some reluctance to put a lot of time into -LSB- unseating Democrats -RSB- , versus -LSB- building -RSB- a more progressive Congress overall ," said former Communications Workers of America union President Larry Cohen , a top Bernie Sanders adviser who now chairs the board of the Our Revolution political group that was spawned from the senator 's 2016 presidential campaign .

Bernie backers give Dem incumbents a pass in 2018 .