Biggest night of this political year.

It was historic, one for Joe Biden.

He wrote a fast breaking wave to score a primary come back beyond any that's come before former vice president put himself back on top of this race.

Bernie Sanders is not far behind.

Mary Bruce is tracking all the latest Good Morning, Mary.

Good Morning, George.

Well, this was a huge upset that just days ago seemed impossible.

With the party establishment coming together behind him in a wave of African American support this morning, Joe Biden is back.

Call Super Tuesday for nothing.

Theme night belonged to Joe Biden of a knockdown counted out left behind.

This is your campaign.

Former vice president, with a massive comeback on the biggest night of the primary so far when he got to Super Tuesday, be over breaking just moments ago.

Michael Bloomberg, Biden's last remaining moderate competitors, announcing he's suspending his campaign after spending over half a $1,000,000,000 former New York City mayor is now bowing out after a disappointing night.

In a statement, Bloomberg says he's backing Biden and will work to make him the next president.

Biden, capturing nine of the 15 contests and gaining more than 300 delegates.

Surprise wins in Massachusetts, Minnesota and Texas, where strong support from black voters helped him ej out Vermont Senator Bernie Sanders and complete a sweep of the South this morning.

It's now a two man race, Sanders making big gains in California, propelled by large portions of the Hispanic vote, also winning Utah, Colorado and his home state of Vermont.

For Senator Elizabeth Warren, the path to the nomination has narrowed after she failed to win a single state.

A campaign aide telling ABC she's talking to her team and assessing her next steps.

Hi, everyone.

George Stephanopoulos here.

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