The election scandal dogging Congressman Joe Garcia’s campaign and two state House races makes it clear: Computer techies are supplementing old-school, block-walking ballot-brokers known as boleteras… A third incident cropped up Thursday in Miami’s mayoral race, but the case appears unrelated to last year’s fraud when two groups appeared to act separately from each other… The ultimate goal was the same: get mail-in ballots into the hands of voters, a job that many boleteras once handled on the streets of Miami-Dade. Now, it’s electronic. “This is the e- boletera era of Miami politics.”