[michigander]

John Kyl of Arizona and Lindsey Graham of South Carolina, have proposed such an amendment.

It appears to be an amendment to the bill itself.
This is the first time I've seen any indication of how they planned to spend the $60 billion+ the bill could raise.

[Wonder Warthog]

"It appears to be an amendment to the bill itself. "

You could be right. I was thinking of Chambliss's proposal to secure funding for border security as a separate bill, to be passed first, but since this is the turncoats Kyl and Graham, that must not be it.