A proposed deal on border security‚ announced after long and painstaking negotiations in the Senate‚ has stumbled out of the gate. Speaker Mike Johnson (R-La.) has declared the push “dead on arrival.” In the Senate — which is typically more open to bipartisan moderation than the House — at least 19 GOP senators have declared they will vote against the bill. Even if the proposal were able to draw the 60 votes it needs to pass in the Senate — a scenario that relies on overwhelming...