A document inadvertently leaked after it was caught on camera proves that Donald Trump does plan to rapidly build a border wall, confounding pundits who have claimed it was all just rhetoric.

Kansas Secretary of State Kris Kobach, an expert on border security and legal immigration, met with Trump on Sunday in New Jersey.

Kobach was holding a file of papers, one of which was snapped by a media photographer from a distance. It is entitled "Department of Homeland Security Kobach Strategic Plan For First 365 Days".

When zoomed in, the paper reads that "in addition to 386 miles of existing wall" there is a further "1989 miles planned for rapid build."

According to Trump's past statements, the total length of the wall wouldn't need to run the whole 2,000 miles of the border due to natural barriers. It now appears that his border wall plan will cover the entire length of the border and may even overcompensate.