Who is Dr. Jerome Corsi?

"An article on World Net Daily by “birther” Jerome Corsi cites two private investigators who say that the first three digits of Obama’s Social Security Number are 042, meaning it was issued in Connecticut, not Hawaii. They also claim it was issued between 1977 and 1979."
https://m.huffpost.com/us/entry/us_609299

"Reached by The Arizona Republic shortly afterward, Zullo said he obtained Ah’Nee’s birth certificate from a man named Jerome Corsi, who had authored a book on the matter."
https://www.azcentral.com/story/news/local/phoenix/2016/12/15/sheriff-joe-arpaio-5-year-investigation-proves-obama-birth-certificate-fake/95444730/

"According to veteran investigative reporter and best selling author, Dr. Jerome Corsi, he was approached three years ago by a group of generals and told that Donald Trump had been recruited by U.S. military intelligence to run in the 2016 Presidential elections, and subsequently help remove corrupt Deep State officials from positions of power"
https://www.exopolitics.org/qanon-is-us-military-intelligence-that-recruited-trump-for-president-to-prevent-coup-detat/

"Jerome Corsi sued Infowars founder Alex Jones on Thursday, heating up the feud between two of the nation’s top conspiracy theorists."
https://www.thedailybeast.com/conspiracists-clash-as-jerome-corsi-sues-infowars-alex-jones

"Political trickster Roger Stone appears to have turned on Jerome Corsi."
https://www.washingtonexaminer.com/news/roger-stone-turns-on-jerome-corsi-he-worked-with-mueller-to-sandbag-me