I am shocked at people that want to embrace the destruction of the USA.
Please, before you embrace some kind of "expansion" of the USA, only needs to do some honest research into the issue. If you read .gov produced info, then you also need to read info from the John Birch Society. You cannot, in all intellectual honesty, come to the conclusion that expanding USA to provide benefits (social security, welfare, education, etc.) to the peoples of Mexico, Brazil, Columbia, et al., will be of benefit to the US Taxpayer, nor the Canadian Taxpayer.
Moreover, unless there is a change to the Constitution, a legal, lawful change, then any "partnership" agreement is not invalid, but a direct violation against the sovereignty of this Nation and clearly warrants implementation of Treason proceedings against any elected official that supports such an expansion.