Former Vice President Joe Biden has surged past Sen. Bernie Sanders in new national polling.

While Sanders bested Biden among voters under the age of 45, the former vice president dominated by a significantly larger margin among voters over 45.

Biden's boost comes after he dominated in South Carolina and the Super Tuesday contests and won endorsements from former South Bend, Indiana, Mayor Pete Buttigieg, Sen. Amy Klobuchar, and the billionaire Mike Bloomberg upon their exits from the race this week.

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Former Vice President Joe Biden has surged past Sen. Bernie Sanders in new national polling after a significant narrowing of the presidential field since the South Carolina primary on Saturday.

More than half of the Democratic primary voters in the poll — 54% — said they would vote for Biden, while 38% said they would vote for Sanders, according to a Morning Consult poll published Friday.

While Sanders bested Biden among voters under the age of 45 — winning 57% of their support — the former vice president was favored by 70% of respondents over 45.

The poll was conducted on March 5 after Sen. Elizabeth Warren announced she was dropping out of the 2020 primary.

After Biden won the South Carolina race, beating Sanders by 29 percentage points, former South Bend, Indiana, Mayor Pete Buttigieg and Sen. Amy Klobuchar dropped out of the race and simultaneously endorsed him. Former New York Mayor Mike Bloomberg also endorsed Biden when he announced his exit from the primary on Wednesday.

Biden dominated Super Tuesday's 14 primaries, winning 10 of the contests as suburban voters turned out in large numbers at the polls.

And while voters' belief in Sanders' electability has declined since the South Carolina primary, their confidence in Biden's electability has grown.

The poll of 1,390 Democratic primary voters has a margin of error of plus or minus 3 percentage points.