But not enough African-Americans, along with Latinos, heeded the call.
Some 88% of African-American voters supported Clinton, versus 8% for Donald Trump, as of very early Wednesday morning. While that's a large margin, it's not as big as Obama's victory over Mitt Romney in 2012. Obama locked up 93% of the black vote to Romney's 7%.
Some 12% of the electorate was African-American this year, compared to 13% four years ago. That's a key drop, especially when paired with a smaller-than-expected growth in Latino votes.
This lowered turnout happened even after Trump repeatedly made sweeping comments about how black communities were in the worst shape ever. Referring multiple times to "inner cities," Trump said black people live in poverty, have no jobs and get shot walking down the street. "What do you have to lose?" he asked.
Read: Trump: Black communities in worst shape 'ever, ever, ever
Clinton's support among Latinos was even more tenuous, despite Trump pledging to build a wall on the Mexican border, accusing undocumented immigrants of being criminal aliens and promising to deport them.
Only 65% of Latinos backed her, while 29% cast their votes for Trump. In 2012, Obama won 71% of the Hispanic vote and Romney secured 27%.
Hispanics inched up to 11% of the electorate, up from 10% in 2012.
Read: What Donald Trump has said about Mexico and vice versa
Beyond the Obama coalition, Clinton was also not as popular with white voters as Obama was. She won only 37% of the white vote, compared to Obama's 39%. Surprisingly, Trump also garnered a slightly smaller share than Romney, capturing 58% of the vote to Romney's 59%.
White voters made up 70% of the electorate this year, down from 72% four years ago.
Read: White, working class and worried
Asian voters, which made up a tiny 4% of the electorate, were also less supportive of Clinton than of Obama. Some 65% of Asian voters cast ballots for her, as opposed to 73% for Obama in 2012.
Clinton also failed to capture as many young voters, who flocked to her rival Bernie Sanders in the primary and to Obama four years ago.
She won 55% of voters age 18 to 29, compared to 37% who cast ballots for Trump. But Obama secured 60% of these young voters to Romney's 37%.
Read: Donald Trump's trouble with women -- an incomplete list
When it came to women voters, Clinton won 54% compared to Trump's 42%. Even though 70% of voters said that Trump's treatment of women bothered them, they still didn't flock to the woman who could have broken the glass ceiling. Obama won 55% of the women's vote in 2012.
