Former President Barack Obama is growing concerned about avowed socialist Senator Bernie Sanders' rise in the primary polls, and may even speak out publicly against the Democratic candidate, according to a new report. Obama, who has remained notably silent during the Democratic primary, could soon change that policy due to his concern over Sanders' increasingly far-out leftist proposals, friends and associates of the ex-president tell Fox Business Network. Obama has told people in private that Sanders is both temperamentally and politically unfit to beat President Donald Trump in the 2020 general election, these people say. Adding to Obama's reported concern...