Vice President Kamala Harris is vetting candidates to be her running mate.
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- Kamala Harris' current likely running mates come from key states like Pennsylvania and Arizona.
- Experts say that Harris' choice may signal her campaign strategy.
- They said it will reveal if Harris plans to target the Rust Belt, Sun Belt, or broader appeal.
Vice President Kamala Harris' campaign is in the process of choosing her running mate, and who she chooses...