Sky News contributor James Brown says Democratic candidates Pete Buttigieg and Amy Klobuchar's decision to withdraw from the presidential race and support Joe Biden, shows a "Stop Sanders Coalition" is forming among moderates.
"There are reports both of them will appear at a Biden rally to give their endorsement to him to stop Bernie Sanders from building a lead on Super Tuesday where more than a third of the delegates are up for grabs," Mr Brown said.
"I don't think Elizabeth Warren will get enough votes to rival Bernie Sanders so her campaign will need to make a decision fairly shortly," he said.
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