Temporary worker in Canada and got job offer from the US

[niko888]

Hi
I am on temporary work permit in Canada and got job offer from the US. I got job offer from the US and would like to accept it. My wife is not in Canada now.
Can I apply for US visa in Canada for me and my wife together
or she has to apply separately in her country
or I should go to US then send her invitation to apply for US visa?

Thanks