(CNN) - A top aide to John McCain said Monday she thought comedian Tina Fey's impersonation of Republican VP candidate Sarah Palin on NBC's Saturday Night Live over the weekend was sexist because it portrayed the Alaska governor as lacking in substance.
The NBC comedy show's season premiere began with a "nonpartisan message" during which Fey's Palin and Amy Poehler's depiction of Hillary Clinton called for an end to sexism in the presidential race.
"The portrait was very dismissive of the substance of Sarah Palin, and so in that sense, they were defining Hillary Clinton as very substantive, and Sarah Palin as totally superficial," Fiorina told MSNBC earlier Monday. "I think that continues the line of argument that is disrespectful in the extreme, and yes, I would say, sexist in the sense that just because Sarah Palin has different views than Hillary Clinton does not mean that she lacks substance."
Watch: 'Palin' makes SNL debut
The former Hewlett-Packard CEO is among McCain's most high profile surrogates and earlier this month was the first member of the Arizona senator's campaign to suggest Democrats were launching sexist attacks at the Republican VP candidate.
"I am appalled by the Obama campaign's attempts to belittle Governor Sarah Palin’s experience,” Fiorina said then. “The facts are that Sarah Palin has made more executive decisions as a Mayor and Governor than Barack Obama has made in his life."
Fiorina, along with other high-profile female backers of McCain, held a press conference at the Republican National Convention criticizing the Obama campaign and the media for what they said were sexist comments about Palin.
"I think one of the things Hillary Clinton's run for the presidency did is attune women's ears to sexist attacks…. Many people have demeaned or belittled [Palin's] experience — and as women, we all know how frequently that happens. This is a well qualified candidate for the vice presidency," she said.