(CNN) - Former United Nations Ambassador John Bolton announced Tuesday he will not seek the Republican presidential nomination in 2012.
Bolton, who publicly discussed a bid for months, made the announcement on Fox News, where he is a contributor, and subsequently on Twitter.
"While I have decided not to seek nomination, know that I will strive to keep national security front and center in 2012 election," Bolton wrote on his Twitter account. "Thank you to supporters! I am honored and humbled. Know that I will continue to be a voice to promote national security. Our job isn't done."