The presumptive Democratic presidential nominee had access to a deep bench when it comes to a vice-presidential pick. The front-runners were: Elizabeth Warren, Julian Castro and Tim Kaine. Click on the photos below to find out more about how Tim Kaine compares to others.
Open this photo in gallery: Thomas Perez: Obama cabinet secretary. Advantage: A Latino politician born to Dominican immigrants and raised in Buffalo, the civil-rights lawyer could energize minority voters. Disadvantage: He is virtually unknown. PETE MAROVICH/Getty Images
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Open this photo in gallery: Elizabeth Warren: U.S. senator from Massachusetts, thorn in Wall Street’s side. Advantage: Energizes the liberal wing of the party and gets under Mr. Trump’s skin. Disadvantage: The Clinton-Wall Street ties clash with a Warren candidacy. Also, a Republican governor would appoint her replacement in the Senate. SAUL LOEB/AFP / Getty Images
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Open this photo in gallery: Tim Kaine: U.S. senator from battleground state of Virginia. Advantage: Already vetted by Obama team in 2008, fluent Spanish speaker, highly respected across party lines. Disadvantage: safe bet that does little to fire up the Obama coalition. MARK WILSON/Getty Images
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Open this photo in gallery: Cory Booker: U.S. senator from New Jersey. Advantage: energizes the Obama coalition of millennials and blacks. Disadvantage: New Jersey is already solidly Democratic in a general election. Also, a Republican governor would appoint his Senate replacement. DREW ANGERER/Getty Images
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Open this photo in gallery: Sherrod Brown: U.S. senator from battleground Ohio. Advantage: He is critical of free trade and appeals to blue-collar voters and the party’s liberal wing. Disadvantage: A Republican governor would pick his Senate replacement. ANDREW HARNIK/The Associated Press
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Open this photo in gallery: Julian Castro: Obama cabinet secretary. Advantage: a youthful Latino pick who hails from Texas and is seen as a rising star. Disadvantage: At 41 years old, may be seen as lacking in experience and not meeting the Oval Office test. JESSICA RINALDI/Reuters
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Open this photo in gallery: Deval Patrick: former Massachusetts governor. Advantage: a powerful speaker and energetic campaigner who could help ensure a strong voting-day turnout among blacks and minorities. Disadvantage: He now works for Bain Capital, loathed by liberals. NEAL HAMBERG/Reuters
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Open this photo in gallery: Al Franken: U.S. senator from Minnesota. Advantage: Imagine the former Saturday Night Live comedian unleashing zingers at Mr. Trump. Also, he appeals to the liberal wing of the party. Disadvantage: Minority voters may not be impressed. DAWN VILLELLA/The Associated Press
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Open this photo in gallery: Tom Vilsack: U.S. agriculture secretary, former Iowa governor. Advantage: A friend of 40 years with Hillary Clinton; a politician with strong executive experience, widely seen as a workhorse. Disadvantage: A lacklustre pick with little foreign policy experience. EUGENE HOSHIKO/The Associated Press
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