What, *I* am paying for it?

Kansas City Infozine makes the following claim:
 
The Stop the Wall Tour begins a four month trek around the United States to educate US taxpayers both about the Wall itself and about how US tax dollars are being used to build it.
 
But it doesn't go into any detail about HOW exactly US taxpayers are funding the wall.
 
I wish they would have.
 
Israel can build all the walls it wants as far as I'm concerned.  But they should pay for it themselves.