Our founding fathers did not believe in open borders, let alone something as crazy and stupid as this. Unfortunately, Obama & McCain seem to be pro-globalists, so don't expect their cabinets to be against this either.
Going to have to be a little more specific than this. What are you referring to? Trade? Immigration? Site any founder quotes or documentation.
Immigration mainly. Here's what Jefferson said:
http://www.idexer.com/articles/jefferson.htmCivil government being the sole object of forming societies, its administration must be conducted by common consent. Every species of government has its specific principles. Ours perhaps are more peculiar than those of any other in the universe. It is a composition of the freest principles of the English constitution, with others derived from natural right and natural reason. To these nothing can be more opposed than the maxims of absolute monarchies.
Yet, from such, we are to expect the greatest number of emigrants. They will bring with them the principles of the governments they leave, imbibed in their early youth; or, if able to throw them off, it will be in exchange for an unbounded licentiousness, passing, as is usual, from one extreme to another. It would be a miracle were they to stop precisely at the point of temperate liberty. These principles, with their language, they will transmit to their children. In proportion to their numbers, they will share with us the legislation. They will infuse into it their spirit, warp and bias its direction, and render it a heterogeneous, incoherent, distracted mass. I may appeal to experience, during the present contest, for a verification of these conjectures.
But, if they be not certain in event, are they not possible, are they not probable? Is it not safer to wait with patience 27 years and three months longer, for the attainment of any degree of population desired, or expected? May not our government be more homogeneous, more peaceable, more durable?
Suppose 20 millions of republican Americans thrown all of a sudden into France, what would be the condition of that kingdom? If it would be more turbulent, less happy, less strong, we may believe that the addition of half a million of foreigners to our present numbers would produce a similar effect here. If they come of themselves, they are entitled to all the rights of citizenship: but I doubt the expediency of inviting them by extraordinary encouragements….
Essentially, when you "open the gates", you get this whole new culture that isn't used to the American way of doing things. As a result, you get turmoil and it makes these people that much more alienated. Letting them come in gradually will still allow us to keep our system of government intact and it would allow people here to adjust to the new immigrants gradually.