GOP senator voices concern about Trump order, hasn't decided whether he'll back it
![GOP senator voices concern about Trump order, hasn't decided whether he'll back it](https://thehill.com/sites/default/files/styles/promo/public/johnsonron_013119sr_lead.jpg?itok=pm1hT1VY)
Sen. Ron Johnson (R-Wis.) has expressed concerns about the precedent set by President Trump's national emergency declaration to reallocate funding for a border wall. During an interview with Chuck Todd set to air in full Sunday on NBC's "...