Biden is up to 16 points ahead nationally as must-win states seem safe – but experts point out polls don’t reflect what will happen when votes are countedAs the Democratic presidential primaries drew to a close in the spring, Laura Hubka was left wondering how she was going to sell Joe Biden to voters in her corner of rural Iowa.Hubka, an ultrasound technologist and chair of Howard county Democrats, lamented that the party cast aside an array of more inspirational, younger and original candidates in favor of a fading politician past his prime. Personally, she backed Pete Buttigieg, the young, gay former Indiana mayor.Hubka couldn’t see how a candidate as uninspiring as Biden would draw support away from the president in a part of Iowa that swung heavily from Barack Obama to Donald Trump four years ago. She quietly braced herself for yet another defeat.Months later, Biden is riding high in the polls and, if the numbers are to be believed, is on his way to a significant victory in three