"She's being a sore loser by supporting a recount."
How to respond: Though Clinton's campaign has now agreed to assist with Jill Stein's recount efforts, they have made it clear that Clinton is not responsible for or even very hopeful about them.
Clinton's campaign was reportedly reluctant to pursue this option, and did not join efforts even after leading computer scientists and voters around the country urged the Clinton campaign to call for a recount. It was only after Stein filed for a recount in Wisconsin that the Clinton campaign finally spoke up — and though they've confirmed that they will assist with and support recount efforts, they have also made it clear that they did not want, push for, or seek out a recount.
Additionally, Clinton counsel Marc Elias wrote that her camp does not believe there is "evidence of manipulation of results," but is participating because of the "obligation to the more than 64 million Americans who cast ballots for Hillary Clinton."