Flanagan made it as a Repub after Rostenkowski got caught with his shenanigans.
Find out what Flanagan did and try to modify it for your needs.
The 5th takes in a lot of Hispanics areas - grass root those areas to death. in fact, make your headquarters in one of those towns (Schiller Park, Franklin Park etc )
Whoever the Rats nominate, I'd tie ‘em directly to Rahm and Blago - Like Obama did with Pres. Bush to McCain.
Have your birth certificate handy.
Should be fun.
First and best thing would be to find a good team within the Hispanic community - conservatives who can take your case to both their own folks and in a face off with other minority groups.
Without that the media and the left will have you nailed to the wall as a tool of the evil western European ruling classes.
Good luck, be sure to provide an address for donations.