2020 presidential candidates Mike Bloomberg, founder of Bloomberg LP, from left, Senator Elizabeth Warren, a Democrat from Massachusetts, Senator Bernie Sanders, an Independent from Vermont, former Vice President Joe Biden, Pete Buttigieg, former mayor of South Bend, and Senator Amy Klobuchar, a Democrat from Minnesota, stand on stage ahead of the Democratic presidential candidate debate in Las Vegas, Nevada, U.S., on Wednesday, Feb. 19, 2020. Beneath all of the sparring between candidates leading up to the debate is a broader strategic question that Democrats must address: Whether the best way to beat President Donald Trump in November is by reassuring moderates with kitchen-table proposals or by bolstering turnout with aggressive ideas that create a clear contrast. Photographer: Joe Buglewicz/Bloomberg via Getty Images
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