Former White House National Security Adviser John Bolton fired up his personal Twitter account Friday, wasting little time before igniting a feud with his former employer: the Trump White House.

"Since resigning as national security adviser, the @WhiteHouse refused to return access to my personal Twitter account," Bolton tweeted. "Out of fear of what I may say? To those who speculated I went into hiding. I’m sorry to disappoint!"

President Trump was asked about Bolton's account during a wide-ranging interview with "Fox & Friends," denying the allegation.

"No, of course not," he said. "I had a good relationship with John."

Bolton has had a fracticious relationship with Trump since he was abruptly dismissed in September after clashing with the president over foreign policy questions like the U.S. relationships with North Korea and Iran.

Earlier this month, Bolton lawyer Charles Cooper wrote a letter to House impeachment investigators telling them Bolton has "personal knowledge" of meetings and conversations related to the impeachment inquiry that "have not yet been discussed in the testimonies so far." The letter claimed that Bolton "was personally involved in many of the events, meetings, and conversations about which you have already received testimony."

However, Cooper said Bolton would be unwilling to testify before the inquiry until a legal battle between House committees and the White House over claims of legal immunity for White House officials is resolved.

This legal battle revolved around one of Bolton's aides, Charles Kupperman, who was been summoned to testify before the House but was barred by the White House. U.S. District Judge Richard Leon set Dec. 10 for oral arguments in the case. 

Bolton first made the allegation of his account being suppressed in a pair of cryptic tweets earlier in the morning. "Glad to be back on Twitter after more than two months. For the backstory, stay tuned," he tweeted at 8 a.m.

"We have now liberated the Twitter account, previously suppressed unfairly in the aftermath of my resignation as national security adviser. More to come," Bolton followed up more than two hours later before finally accusing the White House itself of refusing to return access to his account.