President Trump's speech to the Conservative Political Action Conference started out as a relatively tame performance touting signature accomplishments such as tax cuts and judicial nominations, but it took an ugly turn as he moved to the topic of immigration, broadly painting those who come here as a result of the lottery system as "horrendous." The context was that Trump was lambasting Democrats for not agreeing to his terms as part of an immigration deal. Though they're willing to give him funding for the wall, he said, they won't budge on other issues, such as chain migration and ending the...