Romney wouldn't be able to change that very much. It's a fact that many manufacturing jobs that used to be in the U.S. have flown the coop to places like China and Vietnam and they aren't coming back. Romney can't just wave a magic want and presto - good, decent-paying jobs suddenly appear.
Even FDR couldn't do much about unemployment; he suffered a very serious second recession in 1938 and really it was only World War II that eased the economic crisis.
The GOP mistake is in thinking that because Obama hasn't been able to generate a robust recovery that the voters will automatically give him the boot. It's true that in the past such a thing has often happened but not THIS time. First of all, there is the hunk factor. Secondly, there is the matter of WORLD-WIDE economic problems with the U.S. still doing better than most other countries. And finally, there just isn't much faith that Romney can do a better job. And in fact, a divided Congress would almost insure that he could NOT do much better of a job. Interest rates can't remain this low forever and when they invariably do start heading up, economic conditions could easily get WORSE.
It has been proven to you irrefutably over & over again that there is no such thing as the "hunk factor", in that women voted disproportionately against JFK & Reagan.
The reason companies are fleeing the US is largely for the reason Steve Jobs gave, namely that Obama's regulatory nightmare is driving them out. Of course Romney can reverse job loss. All he has to do is what Reagan & the JFK administration did, ie cut taxes (JFK died shortly before his tax-cutting bill passed Congress).
Your ignorance of history, politics & economics never ceases to astound.