Last week at the RNC, Ivanka Trump introduced her dad, Donald Trump, as the Republican nominee for President She wore a $138 sleeveless dress from her self-titled fashion line, Ivanka Trump Collection Friday morning, a tweet from Trump's account said, "Shop Ivanka's Look From Her #RNC Speech" with a link to the dress on Macy's website Less than 24 hours later, the dress was unavailable at Nordstrom and Macy's