Biden wins four US states on 'Big Tuesday,' reaches out to Sanders

After key wins on "Big Tuesday," Joe Biden reached out to rival Democratic hopeful Bernie Sanders in a bid to unify the party, saying, "Together we'll defeat Donald Trump."

"I want to thank Bernie Sanders and his supporters for their tireless energy and their passion," he said at a conference. "We'll bring this nation together."

Biden has won the states of Idaho, Michigan, Missouri and Mississippi.

As six US states went to the polls to select their Democratic candidate for the 2020 presidential elections, frontrunners Biden and Sanders faced each other in a race for over 350 delegates.

With 125 delegates, all eyes were on Michigan, followed closely by Washington, which had 89 delegates to offer. Missouri (68), Mississippi (36), Idaho (20) and North Dakota (14) finish the round-up. Overall, this round of voting made up close to 10% of the total delegates in the Democratic race.

Following a stellar performance at "Super Tuesday" last week, Biden, the former vice president, took a comfortable lead against Sanders, after some disappointing results in the initial states. Sanders, who suffered a setback in some important states like Texas and North Carolina, hoped to make a comeback with Michigan.

Polling out of the state, however, showed that Biden had a comfortable lead over the Vermont senator, as the moderates and centrists of the Democratic Party rallied around Biden's campaign. Many former Democratic hopefuls, including Senator Kamala Harris, businessman Andrew Yang and more, have endorsed Biden.

Sanders' platform is considered more progressive, laying emphasis on a complete overhaul of the country's health-care system, affordable higher education and criminal justice reform. Biden's, however, is seen as a return to normalcy from the Barack Obama-era.

While the Democratic race began with over 20 candidates running for the nomination, big names like Senator Elizabeth Warren, Mayor Pete Buttigieg and businessman Mike Bloomberg stepped out of the running after disappointing results in the initial phase. Biden, Sanders and Rep. Tulsi Gabbard are still running, but Gabbard only has two delegates.

Notably, both Biden and Sanders canceled their campaign rallies late Tuesday amid coronavirus fears.