Not sure how a scenario where all House members run at large would shake out...I have no doubt a Republican candidate would be the top vote getter, but how the others would place would be the question...wouldn't be a victory to be #1 while 2nd through 6th are all Democrats.
ping
A key difference between multiparty European democracy and the American system is that third parties basically have no chance in a winner-take-all system unless they can replace one of the two major parties.
If all of Kentucky's congressional candidates were running on a single ballot, it would be within the realm of possibility for a “Tea Party” conservative running as an independent (or for that matter, a Libertarian, Green, or some other party) to place in the top six.
Again, I'm a Republican and do not favor the creation of a third party because I believe it is unnecessary. Also, I am not a fan of massive change merely for change’s sake without good reason, but I am in favor of state's rights and the local experimentation that allows. An at-large congressional election in Kentucky, given current political dynamics in the Republican Party, could have some very unexpected consequences.
In 1992, KY Dems, who had a 4-3 advantage in the state’s House delegation, got greedy and tried to draw 6 winnable districts for them (the state lost a CD after the 1990 Census). They extended Hubbard’s KY-01 to the SE to protect Natcher’s KY-02 for when he retired (instead of adding Daviess County); took out Republican East Louisville from Bunning’s KY-04 (adding it to Mazzolli’s KY-03) and added historically Dem counties from Eastern KY; and redistricted Rogers in with Perkins in a new KY-05 that combined GOP counties in southern KY with heavily Dem Coal Country counties. Far from getting a 6-0 Dem delegation, KY had a 5-1 GOP delegation from 1996-2006. Had the Dems drawn über-Republican districts for Bunning and Rogers, they could have had a 4-2 Dem delegation at least prior to Natcher’s death, and maybe afterwards as well. Now, they’re whining that Republicans have a marked advantage in 4 CDs and the Dems have a precarious hold on the other 2. Stupid, greedy Democrats.