Do you have the right to live and work in the U.S i.e Greencard?
If you do not have a Greencard then you may as well forget about any chance of working in the U.S (unless the carrier offers a work permit - which at the moment is unheard of)?!
Also, if you are doing Canadian up to ME-IR, then under the recipricocal agreement between Transport Canada Civil Aviation your licenses are easily converted to FAA if you filfill:
i) Hold a current medical for the category of License
ii) Pass the relevant ground exam (air law and radio comms)
iii) Take an FAA Flight Test
What is probably useful to establish is where you intend to work after being qualified?
Scoobster