Not very likrly and most southerners didn't want them. To quote an old soc.history.what-if post of mine:
Southerners before 1860 were not terribly friendly to immigration. I
do not simply refer to mass nativist movements, although Know Nothingism
briefly flourished in the South as well as the North. I have in mind the
feelings of many Southerners who did not belong to any nativist movement,
like Edmund Ruffin: "One of the great benefits of the institution of
African slavery to the southern states is its effect in keeping away from
our territory, and directing to the north and north-west, the hordes of
immigrants now flowing from Europe, and which accession of population has
already so much demoralized not only the states receiving the largest
supplies of such population, but the federal government itself. Every
political aspirant, aiming for the highest offices, deems it to his
interest to conciliate and attempt to bribe to his support, this new and
enormous element of political power. Hence we see unprincipled, but not
the less influential and dangerous aspirants for presidential honors,
competing with each other, as to who shall offer the highest bids for this
support, in bestowing the public lands gratuitously on immigrants from all
the world. It will not be long before this foreign power, so fostered and
increased, will be so strong, that the grants, conditions, or acquiescence
of the government, will be altogether superfluous and worthless." (Ruffin
acknowledged that "To hundreds of thousands of immigrants from Europe our
country has been greatly indebted for their useful private or public
lives." but added "But I speak of classes, and not of individuals--of the
general rule, and not of its exceptions.")
https://books.google.com/books?id=nWNKAAAAMAAJ&pg=PA64-IA15