1) Deport all 12 million illegals immigrants
Trump said the number of illegal immigrants in the United States is "30 million, it could be 34 million."

The Department of Homeland Security says the number of illegal immigrants was about 11.4 million as of January 2012. Other independent groups that research illegal immigration put the number between 11 and 12 million. We found no compelling evidence that the number could as high as Trump said.

No,, It would be too difficult to do.

2) Build the wall on the border

No,,I can't find someone besides Trump who has self-porclaimed expertise in this subject that says it is possible.

3) Make Mexico pay for it[/QUOTE]
He will not be able to make them pay. Addition tariffs will raise prices at home and will hardly change the number or available jobs with the return of manufacturing. If companies move back to the US, old manufacturing jobs will be replaced by automation [robots].

These Charts Show Why Trump and Bernie Are Wrong to Attack Free Trade