How many miles of border wall existed before the 2006 Secure Fence Act?

Which prominent Democrats voted for the 2006 Secure Fence Act?

Approximately how much of the 2,000 mile border with Mexico is covered by a border barrier?

Approximately how many miles of new wall has the Trump administration built?

According to FAIR, how many miles of border wall are needed to be fully effective?

FAIR estimates that completing the border wall could be done for a budget of up to $25billion. This would save taxpayers a lot of money over time, because the cost of illegal immigration to taxpayers annually is: