The move is a shift from his refusal to discuss the matter before his 2014 reelection.
Bush reportedly hopes he will not be painted as a candidate beholden to the wealthy.
The AP reported that the email server was registered using her New York home address.
Clinton hit hard on the themes of economic fairness and equal pay.
Clinton teased her likely presidential run throughout her speech.
Harris outlined a campaign fighting for the downtrodden at the gala dinner.
Julian Hattem 03/03/15 04:04 PM EST
Critics have worried that hackers may have been able to intercept the personal emails.
Democratic rep. is part of a huge field of candidates that could be eyeing the now-open seat.
DSCC executive director warns Democrats need to win now because of a tough 2018 map.
The freshman Republican is a top target for Democrats in 2016.