Democratic 2020 presidential candidate Sen. Kamala Harris said Tuesday she's "open to the discussion" about doing away with the Electoral College, and allowing the president to win election by winning the national popular vote.

"There's no question that the popular vote has been diminished in terms of making the final decision about who's the president of the United States and we need to deal with that," the California Democrat said late Tuesday on ABC's "Jimmy Kimmel Live."

Democratic Sen. Elizabeth Warren of Massachusetts this week was more definitive in her call to nix the Electoral College during a CNN town hall event in Jackson, Miss.

"My view is that every vote matters. And the way we can make that happen is that we can have national voting, and that means get rid of the Electoral College," Warren said.

[Related: Trump changes his mind on the Electoral College]

Mayor of South Bend, Ind., Pete Buttigieg has similar sentiments against the process after Democratic presidential nominees Al Gore and Hillary Clinton won the popular vote but lost the Electoral College, and thus the election, in 2000 and 2016 respectively.

Fellow presidential hopeful and entrepreneur Andrew Yang of New York, however, has come out against any changes to the system.

"The problem with deciding Presidential elections via popular vote is that candidates would naturally campaign in urban areas with big media markets and their policies would follow suit," Yang tweeted shortly after Warren's town hall. "Better to have proportional electoral college votes in each state so you campaign everywhere."

[Opinion: What you need to know about abolishing the Electoral College]