Joe Biden has credited Amy Klobuchar for his victory in the Minnesota Democratic presidential primary.
"We won Minnesota tonight because of Amy Klobuchar," he said as he gave his speech following a successful Super Tuesday.
Biden edged out Sanders after coming from nowhere to win Minnesota, and a large part of that victory appears to e down to Klobuchar's withdrawal.
The most recent poll for Minnesota had Klobuchar ahead of Sanders, with Elizabeth Warren in third and Biden a distant fourth.
But with the Minnesota senator dropping out and endorsing Biden on Monday, the former vice-president appears to have picked up a huge number of her voters.
Biden had little in the way of a ground game in Minnesota compared to other candidates, but did run TV and online ads on Tuesday featuring Klobuchar.
After his victory, Klobuchar – who will now campaign on Biden's behalf – tweeted: "Congrats to Joe Biden on a great night, including his victory in Minnesota!
"As I said last night, Joe will bring our party together and build a strong coalition to unite this country. And he will win big in November!"
The question now remains what role, if any, Klobuchar would play in Biden's administration in the event he wins the nomination, and wins against President Donald Trump in November.
On the other side, Minnesota's 5th District Rep. Ilhan Omar suggests that Sanders would have won if the progressive candidates – namely Elizabeth Warren – had dropped out and endorsed him.