Judging from their vocal criticism of President Trump, it's clear that neither Mr. nor Mrs. Obama shares G.W. Bush's viewpoint that it's terrible for the country and the presidency to undermine a current president.
Barack does it by praising anything and anyone who opposes the president's policies and, by doing so, manages to disparage the man who took his place. Michelle, on the other hand, is much less diplomatic. Instead of using discretion, Mrs. Obama vomits out anti-Trump venom wherever she goes.
Michelle's Trump-Bashing Tour started right after the 2016 election, when Mrs. Hope and Change told Oprah Winfrey that because Trump was elected, "now we're feeling what not having hope feels like."
In May of 2017, Mrs. Obama spoke out against Trump when he dared loosen the stringent dietary restrictions connected to her unpopular school lunch program. Months later, at an Inbound marketing conference in Boston, Michelle rebuked a segment of the sisterhood when she declared, "Any woman who voted against Hillary Clinton voted against their [sic] own voice."