Longtime Trump adviser Roger StoneRoger Jason StoneOverwhelming majority of voters want final Mueller report released: poll Trump seizes on poll that shows half agree Mueller investigation is a 'witch hunt' Judge sets Roger Stone trial for early November MORE in a fundraising email on Tuesday invoked the gag order he is under as he attempted to raise money for his defense fund.

Stone, who was arrested last month during a pre-dawn FBI raid of his Florida home, wrote in the email that it "may be the last time you hear from me if I am gagged by the Judge."

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Judge Amy Berman Jackson on Friday issued a gag order barring Stone, his attorneys and prosecutors from discussing his case in public. Stone's fundraising email was sent Tuesday evening.

In the email, Stone refers to Jackson as an "Obama-appointed Federal Judge" and wrote that the "real reason they want to gag me is so I cannot raise the money necessary to mount a vigorous legal defense."

Jackson earlier this week ordered Stone to appear in court Thursday to explain why the gag order she imposed shouldn't be lifted. The appearance will come after Stone shared and deleted a photo of Jackson on his Instagram page over the weekend, showing Jackson with what appeared to be small crosshairs next to her head.

Special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE's team has brought seven charges against Stone, including obstruction of a congressional inquiry, witness tampering and five counts of making false statements to Congress.

Stone wrote in his fundraising email that he has been targeted because of his relationship with Trump. 

"We both know I have been targeted by Mueller and the Deep State simply because I am a long-time confidant and friend of the President and I effectively helped defeat Hillary ClintonHillary Diane Rodham ClintonTrump mocks wind power: 'When the wind doesn't blow, just turn off the television' Trump's approval rating stable at 45 percent Kellyanne Conway: 'I think my gender helps me with the president' MORE. The Democrats want me side-lined in 2020 so I cannot help the President," Stone wrote.