Sanders faces mounting attacks from anxious moderates as Iowa vote nears

Centrists criticize Sanders as a ‘uniquely’ flawed candidate – but polls show him ahead in Iowa and tied with Biden nationallyDays before Democrats begin voting for a nominee to take on Donald Trump, panic is beginning to spread in some corners of the party that their standard-bearer could be a 78-year-old democratic socialist from Vermont.As Bernie Sanders shows signs of strength ahead of Monday’s Iowa caucuses, anxious Democrats fear a repeat of 2016, when establishment