It won’t be from sea-to-sea; how long will border wall be?

The White House insists that plans for President Donald Trump’s border wall are on track despite resistance from Congress.

What it’s not saying is how it envisions the wall these days.

Trump’s promise to build what he calls a “big beautiful wall” – and have Mexico pay for it – was a rallying cry in his campaign. It conjured images of an imposing structure spanning the 2,000 miles (3,200 kilometers) of America’s southern border, of something too tall and strong for foreigners to dare cross illegally.

But since Trump took office, his aides have made clear that’s not their plan.

So how long will it be?

And how much of it will be a thick new wall as opposed to patching up existing fences and other measures?

It’s not clear.