GOP trouble in Florida?

A Democratic polling firm finds two Cuban-American Republican congressmen barely leading their Demoocratic rivals in the Miami area. This may or may not be trouble for the GOP. It's hard to judge the reliability of partisan polls, and House races are much harder to poll than statewide races. On the other hand, this poll -- and the free publicity given to it by McClatchy Newspapers -- will help drive fundraising for the challengers.