In her new memoir Becoming, Obama blasts Trump writing that she was in "shock" when she found out he would be replacing her husband in the Oval Office and tried to "block it all out".
"What if someone with an unstable mind loaded a gun and drove to Washington", she wrote in her book, according to The Washington Post. "Donald Trump, with his loud and reckless innuendos, was putting my family's safety at risk", she wrote. "I'll never forgive him [Barack Obama] for what he did to our military", he said.
She criticizes Trump for the 2005 "Access Hollywood" tape, interpreting his comments to mean: "I can hurt you and get away with it", The Associated Press reported. "I'll give you a little controversy back - I'll never forgive [President Barack Obama] for what he did to our United States military by not funding it properly".
"He doesn't have a birth certificate, or if he does, there's something on that certificate that is very bad for him", Trump said during an interview with Fox News host Laura Ingraham in 2011.
During a Friday morning pool spray at the White House, Trump addressed the former first lady's book.
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She writes in the memoir about how Donald Trump and other so-called birthers in 2011 began to openly question whether her husband was an American citizen, describing their actions as "crazy and mean-spirited ... its underlying bigotry and xenophobia hardly concealed".
Michelle's book, 'Becoming Michelle, ' is about to be released, and she is extremely candid about her marriage, saying 20 years ago she felt "broken" after suffering a miscarriage.
She revealed to Roberts that she underwent in vitro fertilization (IVF) in order to conceive her two daughters. "But it was also unsafe, deliberately meant to stir up the wingnuts and kooks", Michelle wrote. She says she has a "phenomenal marriage" and "we work on our marriage".
But she admits the couple on occasion turned to counseling, where they "learned how to talk out" problems.
She reportedly accuses the president of jeopardizing her family's safety.
And while Trump suggested Obama left him with "old and tired" military equipment, Harvard University professor Matthew Bunn noted that it was Obama who, in 2015 "laid out a $1 trillion plan to modernize every aspect of the USA nuclear arsenal over the next 30 years".