Sen. Barbara BoxerBarbara Levy BoxerBottom line Trump administration halting imports of cotton, tomatoes from Uighur region of China Biden inaugural committee to refund former senator's donation due to foreign agent status MORE (D-Calif.) will introduce legislation on Tuesday to get rid of the Electoral College, after Hillary ClintonHillary Diane Rodham ClintonCommunion vote puts spotlight on Hispanic Catholics Trump's biggest political obstacle is Trump The Memo: Some Democrats worry rising crime will cost them MORE lost the presidential election despite leading in the popular vote. 

"In my lifetime, I have seen two elections where the winner of the general election did not win the popular vote," Boxer said in a statement. "In 2012, Donald TrumpDonald Trump Pence said he's 'proud' Congress certified Biden's win on Jan. 6 Americans put the most trust in their doctor for COVID-19 information: poll OVERNIGHT DEFENSE: Biden administration to evacuate Afghans who helped US l Serious differences remain between US and Iran on nuclear talks l US, Turkish officials meet to discuss security plans for Afghan airport MORE tweeted, 'The electoral college is a disaster for a democracy.' I couldn't agree more. One person, one vote!"

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She added that Clinton, whom she supported, is "on track to have received more votes than any other presidential candidate in history except Barack ObamaBarack Hussein ObamaThe Hill's Morning Report - Presented by Facebook - Senators, White House to meet on potential infrastructure deal Earthquake: Black candidates rack up city wins Obama: Voting rights bill must pass before next election MORE."

"The Electoral College is an outdated, undemocratic system that does not reflect our modern society, and it needs to change immediately," she said.

Clinton is currently leading Trump by nearly a million votes, according to a Cook Political Report tracker of the national popular vote, but Trump won the Electoral College, leading the former secretary of State 290-232.

According to Pew, Clinton would be the fifth person to win the popular vote but lose the election, with the most recent being Al GoreAlbert (Al) Arnold GoreOn The Money: Centrists gain leverage over progressives in Senate infrastructure battle | White House rules out gas tax hike Democrats have turned solidly against gas tax Overnight Energy: Biden seeks to reassert US climate leadership | President to 'repeal or replace' Trump decision removing protections for Tongass | Administration proposes its first offshore wind lease sale MORE in 2000.

Boxer's legislation would amend the Constitution to abolish the Electoral College. Even if it is approved by Congress it would need to be approved by three-fourths of the states within seven years before it would take effect. 

Trump called the Electoral College "genius" on Tuesday morning, despite past criticism. 

The tweet comes after Trump said during a "60 Minutes" interview on Sunday that he still has issues with the Electoral College.

“I’m not going to change my mind just because I won,” the president-elect said. “But I would rather see it where you went with simple votes. You know, you get 100 million votes and somebody else gets 90 million votes and you win.”