Alabama Senator Katie Britt delivered the Republican response to the State of the Union address. Julian Zelizer: Britt's use of a story related to events that occurred in Mexico was not technically a lie.

But the careful wording is a sign that he knew he was lying and wanted a way out, he says. Zelizer says if Trump thinks that immigrants are an existential threat, he could carry out his plan for mass raids and deportations if he wins in November. He says the myth that Trump seems to tirelessly denounce – the “looting of our cities” – is a myth.