Ivanka Trump and her brothers are responding to a new art exhibit that portrays the presidential daughter vacuuming crumbs.Ivanka Trump says in a tweet about the "Ivanka Vacuuming" installation: "Women can choose to knock each other down or build each other up. I choose the latter."Her brother Donald Trump Jr. tweeted it's "Sad, but not surprising to watch self professed `feminists' launching sexist attacks against @IvankaTrump. In their crazed world, sexism is OK if hurts their political enemies." Eric Trump claimed on Fox his sister is a "powerful woman who has done more for women than probably anybody in Washington D.C." The art piece by Jennifer Rubell invites the public to ``throw crumbs onto the carpet, watching as Ivanka elegantly vacuums up the mess, her smile never wavering.''