Aristide announced his candidacy for the presidency. State level elections occur at the same time as those for the presidency and Congress. It was the first veto of his presidency. Cybersecurity emerged as an important issue during Obama's presidency. He remained in the role for the entire first term of the Obama presidency. Ford was the target of two assassination attempts during his presidency. He was instrumental in securing the nomination of Horace Greeley for the presidency. Kennedy said he was not considering the vice presidency. Almost immediately, opposition arose to the Adams presidency. Thompson was opposed to the Bill Clinton presidency. Delbert Ehlers was an Independent candidate for the Presidency. Johnson retained senior Kennedy appointees, some for the full term of his presidency. Both parties have nominated candidates for the presidency and other offices. Coates sees parallels between that earlier period and the Obama presidency. He held that position for the remainder of Johnson's presidency.