McCaskill 'not sure' Sanders, Harris, Warren can win Missouri in 2020

Outgoing Missouri Sen. Claire McCaskillClaire Conner McCaskillMomentum growing among Republicans for Supreme Court vote before Election Day Democratic-linked group runs ads in Kansas GOP Senate primary Trump mocked for low attendance at rally MORE (D) says that she's unsure whether a prominent Democrat from the party's progressive wing would have a chance at winning her state in 2020, while calling for the next nominee to inspire Americans and convince them that change is possible.

In an interview with MSNBC's "Morning Joe," McCaskill was asked by co-host Joe Scarborough whether Sens. Kamala HarrisKamala HarrisHarris faces pivotal moment with Supreme Court battle Nearly 40 Democratic senators call for climate change questions in debates Joe Biden has long forgotten North Carolina: Today's visit is too late MORE (D-Calif.), Elizabeth WarrenElizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass.) or Bernie SandersBernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.) could win Missouri in 2020.

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"I'm not sure about that," McCaskill responded. "I do think that what as a party we need to do is make sure that we are nominating someone who is inspirational, and who can convince the American people that they can make things change."

"And it's very hard to make things change when you're hanging out at the ends of the spectrum. If you're on opposite sides of the room," the senator continued. "And saying things that you know will never get 60 votes in the Senate. So I think, what I hope, is there's some authenticity with the candidate who will convince independent voters in my state and other states like mine that they have an equation where they can bring people together."

McCaskill, who endorsed Hillary ClintonHillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE in 2016's Democratic primary, told the St. Louis Post-Dispatch earlier this week that she has no plans to re-enter public office but said she plans to continue aiding the Democratic Party.

“I am not going to disappear,” McCaskill said Wednesday. “I am going to help and I think I can help in terms of the party recruiting good candidates, being prepared. I envision trying to help teach candidates some of the basics."

McCaskill was defeated by 6 points in last month's midterm elections by Sen.-elect Josh HawleyJoshua (Josh) David HawleySenate GOP faces pivotal moment on pick for Supreme Court Renewed focus on Trump's Supreme Court list after Ginsburg's death What Facebook's planned change to its terms of service means for the Section 230 debate MORE (R) in a state where President TrumpDonald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE defeated Clinton by roughly 18 points in 2016.