A feud between presidential candidates Sens. Elizabeth Warren, D-Mass., and Bernie Sanders, I-Vt., has sparked a vow by 18 progressive groups to stay focused on the "corporate wing" of the Democratic Party, The Hill reported.
Those signing a three-part pledge — posted on Progressives Unite 2020 — include seven groups who back Sanders's presidential bid and two that back Warren's. The remaining nine are either supportive of both or have not endorsed anyone yet, The Hill reported.
According to The Hill, the pledge says the groups will "focus our fight for the nomination against candidates supported by the corporate wing, instead of fighting each other."
"When progressives fight each other, the establishment wins," Charles Chamberlain, the chairman for Democracy for America, told The Hill.
"We saw it in 2004 when progressives took each other out and John Kerry slipped through to win Iowa and then went on to lose in November to a very unpopular Republican incumbent. We're determined to not let that happen again."
Sanders and Warren had agreed to not attack one another and stuck to that pledge for all of 2019.
But the detente ended this week after reports the Sanders campaign was telling volunteers to question whether Warren is electable.
Warren later alleged Sanders told her in a private meeting in 2018 that a woman could not win the White House. Sanders denies it.
The friction erupted at post-debate exchange Tuesday in Des Moines when Warren confronted Sanders and accused him of calling her a "liar on national TV."
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