Joe Biden's Lead in Democratic Primary br Expands to Widest Margin in Months.br A new CNN poll conducted by br research company SSRS shows the former br Vice President's lead as the most significant since April.br According to the poll, 34 percent of registered Democratic br or Democratic-leaning voters support Biden's bid br for the 2020 Democratic nomination for president.br Biden has seen a boost of support br from racial and ethnic minority br registered voters. Support from that br demographic is up nearly 15 percent.br Older voters and moderate or br conservative Democrats have br also increased their support br for the former Vice President.br The poll reveals that voters currently believe br Biden is best suited to handle major issues br including foreign policy, the economy, br immigration and gun policy.br Sen. Elizabeth Warren (MA, D.) br emerged as the candidate most voters br want to hear more about, according to the poll.br She leads Sen. Bernie Sanders (VT, D.