Sen. Amy Klobuchar, D-Minnesota, said Sunday that women in politics are held to a higher standard than men, arguing that a female candidate with South Bend, Indiana, Mayor Pete Buttigieg’s experience probably would not make it to the presidential debate stage. Klobuchar’s comments mark the latest instance of a 2020 presidential contender taking aim at Buttigieg, a newcomer on the national political stage whose ascent in the fundraising race and in polls for the Democratic nomination has taken many by surprise. They also bring renewed attention to the hurdles female candidates face, following former vice president Joe Biden’s description last week of Sen.