The message went to Hillary Clinton, Huma Abedin and John Podesta

Phone calls are mentioned in email from campaign manager Robby Mook

Jane Sanders called Peter Shumlin twice before endorsement in May 2015

Bernie Sanders' wife begged Vermont's governor not to endorse Hillary Clinton, leaked emails have revealed.

Clinton campaign manager Robby Mook sent a message on May 20, 2015 to Clinton herself, vice-chairwoman Huma Abedin chairman John Podesta. That day, Governor Peter Shumlin endorsed Clinton in the presidential race - against Vermont Senator Bernie Sanders.

In the email, Mook informs Clinton, Podesta and Abedin that Shumlin has decided to endorse Clinton and asks Clinton to call and say thanks because 'this was a bold move for him'.

Bernie Sanders' wife Jane (pictured with him) begged Vermont Governor Peter Shumlin not to endorse Hillary Clinton in May 2015, according to leaked emails

'Apparently Jane Sanders has now called him twice and begged him to change his mind and he's stood firm. Huma, I will send contact info asap,' the email, obtained by Wikileaks, reads.

But Jane Sanders denied ever begging for Shumlin's endorsement in a tweet Thursday morning.

'1st, I don't beg. Knew Gov Shumlin endorsement of HRC worthless,told him his timing as @BernieSanders announced was pathetic crass politics,' she wrote.

Sanders officially launched his campaign on May 26 last year. He endorsed Clinton in July this year after losing in the primaries.