Amy Klobuchar to end presidential bid and endorse Joe Biden; Pete Buttigieg rumored to be backing former VP, too

Minnesota Sen. Amy Klobuchar (D) plans to exit the race for president and endorse former Vice President Joe Biden, various outlets reported Monday.

Klobuchar's decision to drop out of the nominating contest comes just one day before voters cast ballots in her home state of Minnesota as a part of Super Tuesday, the largest delegate handout of the primary season.

According to CNN, Klobuchar will officially announce her decision to suspend her campaign and endorse Biden at a rally for the former vice president in Dallas Monday night.

Klobuchar joins a growing number of candidates who have dropped out in the days following Biden's decisive win in South Carolina, including former South Bend, Indiana, Mayor Pete Buttigieg and billionaire hedge fund manager Tom Steyer.

The senator was unable to capitalize on momentum following her surprisingly strong third-place finish in New Hampshire last month. In the South Carolina primary over the weekend, Klobuchar finished a distant sixth with just over 3% of the vote.

On Sunday, Klobuchar was forced to cancel a rally in her home state after Black Lives Matters protesters seized the stage.

Mayor Pete is also rumored to endorse Biden

With the Democratic Primary increasingly becoming a two-man race between Biden and Sen. Bernie Sanders (I-Vt.) — and with the prospects of a Sanders nomination alarming the less-radical wing of the party — more endorsements for Biden may continue to roll in.

As such, an endorsement from Buttigieg is "likely," CNN's Jeff Zeleny reported Monday, though the timing of the possible endorsement remains unclear.

Interestingly, despite the boost that an endorsement from Klobuchar (and potentially Buttigieg) might give, Zeleny is also reporting that Biden's team desired that other candidates would stay in the race to cut into Sanders' amassing of delegates. Specifically, Biden's team was hoping that Klobuchar and Sen. Elizabeth Warren (D-Mass.) would stay in the race to deny Sanders delegates in Minnesota and Massachusetts.

On Tuesday, 1,357 delegates, or about one-third of the total delegates, will be at stake as 14 states hold nominating contests.