By David Weigel | The Washington Post
DES MOINES — Last June, on the day that Donald Trump announced his presidential bid, Republican strategist Katie Packer issued a warning to her party.
“As deputy campaign manager of Mitt Romney’s 2012 presidential bid, I saw first-hand how the rhetoric on immigration during the GOP primary, from all of the candidates, painted our party in a negative light and came back to bite us in the general election,” she wrote.