Hillary herself said she voted for a wall on the Mexican border
Although this seems wildly off topic, I thought I'd help by adding some specific facts.
She voted on
double fences and additional vehicle checkpoints. It was estimated to cost about $4billion but due to a lack of budget and a differing opinion by the DHS, it was not fulfilled as it was written (700 miles of fencing, but only a few dozen miles were double fenced).
Projected costs of Trump's wall run between double and quadruple this cost.