Former Florida Gov. Jeb Bush's three delegates at the Republican National Convention cost him and his campaign about $50 million each. 

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Bush, who ended his presidential campaign in February after a poor showing in the South Carolina primary, had only three delegates vote for him at the Republicans' nominating convention Tuesday. His campaign and super-PAC spent $46 million for each delegate, according to The Washington Post's Dave Weigel.

He was a favorite going into the primary season and had substantial financial backing from his family network, but he was unable to muster the enthusiasm his campaign needed.

Donald TrumpDonald John TrumpOvernight Health Care: US hits 10,000 coronavirus deaths | Trump touts 'friendly' talk with Biden on response | Trump dismisses report on hospital shortages as 'just wrong' | Cuomo sees possible signs of curve flattening in NY We need to be 'One America,' the polling says — and the politicians should listen Barr tells prosecutors to consider coronavirus risk when determining bail: report MORE's attacks on Bush as “low energy” resonated with GOP voters and hurt the former Florida governor, who struggled to compete with the business mogul and GOP presidential nominee.

Bush has said he won't vote for either Trump or presumptive Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonWe need to be 'One America,' the polling says — and the politicians should listen Poll shows Biden with 6-point edge on Trump in Florida Does Joe Biden really want to be president? MORE and has no plans to attend the Republican convention.