FTP name, this 1846 motion.
Attached as an amendment to a bill authorizing appropriation for territorial purchase, it was never enacted, although it became the focus of national controversy for 4 years.  Named after a Pennsylvania Democrat, it motioned to exclude slavery from any territory acquired from Mexico.  FTP name, this 1846 motion.
Attached as an amendment to a bill authorizing appropriation for territorial purchase, it was never enacted, although it became the focus of national controversy for 4 years.  
Wilmot Proviso