Hint: It's not what you do to a rabid right wing pundit when he spews lies. That's called "Cliffing" and it's more effective and legal.
No, "[c]aging" is a longtime voter suppression practice by which political parties collect undeliverable or unreturned mail and use it to develop "challenge lists" on Election Day.
Internal city memos show the issue of Republican "vote caging" efforts in Jacksonville's African-American neighborhoods was discussed in the weeks before the 2004 election, contradicting recent claims by former Duval County Republican leader Mike Hightower - the Bush-Cheney campaign's local chairman at the time.Hightower says, "Nuh-uh," only in Republicanese.
"Vote caging" has a long history in politics. In one such procedure, a campaign will send out postcards to a particular group of addresses with instructions to return the mail. The campaign then creates a database of addresses that did not return the postcards and challenges the right of anyone registered at those addresses who attempts to vote on Election Day. The effect often dissuades turnout. The tactic is legal, but not if voters are targeted by race. [...]
Ann Farra, a former chairwoman of voter registration and education for the Duval County Democratic Party, said the fact no challenges occurred in 2004 is irrelevant, and Hightower was aware of the Bush-Cheney campaign tactics.
"This is like Bill Clinton saying he didn't have sex with Monica Lewinsky," Farra said. "Word had gotten out into the communities and caused people to stay away from the polls. Suppression was going on left and right."
Quite the contrast between Clinton's vs. the Republicans' idea of fun.