FTP, name this resolution that passed in the House but not the Senate and which sought to ban slavery in any acquired Mexican territory.
In a surprising move it was voted down by Iowa's legislature.  In its first appearance it was linked to a two million dollar appropriations bill and the next year to a three million dollar appropriations bill.  In the nominating convention the next year, Lewis Cass failed to address it and his Democrats voted down a resolution condemning it, giving Zachary Taylor the momentum.  FTP, name this resolution that passed in the House but not the Senate and which sought to ban slavery in any acquired Mexican territory.
In a surprising move it was voted down by Iowa's legislature.  
Wilmot Proviso