Martha Stewart isn't afraid to diss an old co-worker, even when he is running for U.S. President. The lifestyle mogul has joined the ranks of business leaders like Reid Hoffman and Meg Whitman who aren't afraid to voice strong opinions about Donald Trump, saying he is not fit to be President.

Stewart, who has publicly feuded with Trump for years over the quality of NBC's spinoff of his show, Martha Stewart: The Apprentice, told CNN on Monday,

"This is the most important election of the last hundred years. We have to be very certain that we elect a person who has experience, knowledge, a base of education in [world politics] as well as domestic politics, and so obviously I'm voting for Hillary Clinton."

Stewart's comments mirror those of Warren Buffet, who in August called Trump a "dangerous demagogue," and Meg Whitman who told the New York Times in Trump had "already undermined the character of the nation." And though some business leaders are still wary of making any political statements, Reid Hoffman and Mark Cuban have consistently abused Trump on Twitter for months.

Executives and investors like Apple CEO Tim Cook, Salesforce CEO Marc Benioff, Napster founder Sean Parker, and LinkedIn founder Reid Hoffman have each donated or raised over $100,000 for Clinton.