Biden is still riding support from older and African American voters to victory, exit polls show

Former Vice President Joe Biden is on another hot streak Tuesday evening, capturing the first three primaries to be called on the night in Mississippi, Missouri, and Michigan, and he owes a lot of it — as he does much of his comeback — to two key voting demographics.

Exit polls show Biden holds a convincing lead over Sen. Bernie Sanders (I-Vt.) among black voters in all three states. That includes an 87 percent to 11 percent margin in Mississippi, a 69 percent to 28 percent difference in Missouri, and in Michigan he held an edge of 66 percent to 29 percent. The numbers in Mississippi, in particular, boosted Biden in the state, just as they've done throughout the South.

He cleaned up among voters older than 45, as well, the importance of which is amplified considering that age groups made up a vast majority of the electorate in all three states, including 71 percent in Missouri, 67 percent in Mississippi, and 63 percent in Michigan, per CNN. Tim O'Donnell

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