US Democrats nominated Joe Biden as their 2020 presidential candidate on Tuesday, offering the Washington veteran as a "man of courage" who would sweep away the "chaos" of four years under Donald Trump. Viewers tuning in to Day 2 of the four-day Democratic National Convention saw presenters affirm Bidens character and leadership while drawing a sharp contrast with the brash Republican scrambling to remain in the White House after Novembers election. In an unprecedented and elaborate roll call vote that took place entirely online due to the coronavirus pandemic, all 50 states and seven territories announced their vote tallies that cemented Bidens role as the party flagbearer. It was a diverse array of politicians, everyday Americans and even some of Bidens erstwhile rivals who helped nominated the 77-year-old Biden. "Well thank you very, very much, from the bottom of my heart," a beaming Biden said in a live video link. "It means the world to me and my family," he added, reminding viewers he will deliver a formal acceptance speech on Thursday at the conclusion of the four-day jamboree. The nomination was a formality as he had already won the majority of the more than 3,900 delegates back in June, AFP reported. The roll call came on Day 2 of the mostly virtual Democratic National Convention aimed at celebrating the partys candidate and welcoming independents and frustrated Republicans into their political movement to oust Trump from the White House. The proceedings included a series of presentations by party leaders past and future who unleashed their own arguments against the White House incumbent and urged voters to rally around Biden. The lineup featured 95-year-old president Jimmy Carter, who served one term from 1977, and 1990s commander-in-chief Bill Clinton, who warned that the Trump White House is swirling with chaos instead of the competence necessary to address the nations crises. "At a time like this, the Oval Office should be a command center. Instead, its a storm center. Theres only chaos," Clinton said.