Border Patrol Immigration is a touchy subject this election year, but the fight extends beyond the usually specified borders in the case of Jimmy Smyth, one of the H-Block Four, a group that broke out of Northern Ireland's Long Kesh Prison and came to the Bay Area as political refugees. Smyth is in a Pleasanton prison awaiting news of his fate, which will likely be decided by President Clinton and Secretary of State Warren Christopher. Smyth is eligible to apply for bail in September, but the British government wants him back under its jurisdiction; Smyth's supporters say his extradition would mean his certain death. A rally protesting the proposed extradition and addressing immigrant and refugee rights begins at 7:30 p.m. at the Irish Cultural Center, 2700 45th Ave., S.F. Admission is a $5 donation; call 695-0135.