2. She risks alienating the swing suburban voters who will be critical to winning the election. If Trump manages to find some momentum, it will be by framing himself as the candidate best equipped to get the economy back on track. There’s no better way to advance that message than by using Warren as a foil to scare affluent suburban voters. Biden will need to drive up his margins with moderate suburbanites to hedge against Trump’s likely resilience with white working-class voters. Any running mate who could hurt him with such an important part of his coalition isn’t worth the risk.

3. Warren wouldn’t energize African-American voters. Ensuring black voters turn out to vote is a top priority for the Biden campaign, and it’s why there’s pressure for him to put a woman of color on the ticket. Warren, meanwhile, struggled to win much support from African-American voters in the primaries even as she courted black activists throughout the campaign. Her wonky, policy-centric approach to politics isn’t an ideal place from which to rally the base for such a consequential campaign.