John F. Kennedy assassination conspiracy theories of the plot was thwarted, the authors allege, because it would have revealed embarrassing evidence of American government involvement with organized crime in plots to kill Castro. A 2003 Gallup poll indicated that nearly 20% of Americans suspected Lyndon B. Johnson of being involved in the assassination of Kennedy. Critics of the Warren Commission have accused Johnson of plotting the assassination because he "disliked" the Kennedys and feared that he would be dropped from the Democratic ticket for the 1964 election. According to journalist Max Holland, the first published allegation that Johnson perpetrated the assassination of Kennedy appeared in Penn
Assassination of John F. Kennedy to impact the facts of the Kennedy assassination. President Donald Trump said in October 2017 that he would not block the release of documents. Many conspiracy theories posit that the assassination involved people or organizations in addition to Lee Harvey Oswald. Most current theories put forth a criminal conspiracy involving parties as varied as the FBI, the CIA, the U.S. military, the Mafia, Vice President Johnson, Cuban President Fidel Castro, the KGB, or some combination of those entities. Public opinion polls have consistently shown that a majority of Americans believe there was a conspiracy to kill Kennedy. Gallup polls have