John Bolton posts cryptic message implying Trump's White House trying to silence him

Former National Security Adviser John Bolton has returned to Twitter following an unexplained hiatus since his resignation in September, saying the White House blocked access to his personal account and suggested they are fearful of what he might say.

His name has repeatedly surfaced in the impeachment hearings as a witness to key events, and on Friday afternoon he tweeted: "To those who speculated I went into hiding, I’m sorry to disappoint!" and cryptically promised to share his "backstory".

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