"There are some people out there who want to declare this race over now, before all the ballots have been counted or even cast," Clinton writes in the email. "There are some who say they don't know why I'm in this race. So let me tell you why I'm still running."
After writing that she is remaining in the race "for everyone who needs a champion," including hardworking families and "the more than 16 million people like you who have supported me," she adds: "With your help I'm going to keep fighting until every last American has a chance to be heard, and as we learned last night in West Virginia, I know we can win."
Clinton also writes she is staying in the race "because I have the best chance of beating John McCain in November and putting America on the right track."
Last night, just after her big win in West Virginia, Clinton sent out a different fundraising appeal.
"I'm going to carry the energy of tonight's victory into the next contests in Kentucky and Oregon," Clinton wrote, adding: "We've proved conventional wisdom wrong time and again in this race. We did it again tonight in West Virginia. Let's keep going."