It's important to get more Democrats on board. In Texas, Senator Cornyn is a co-sponsor and Senator Hutchinson is running for governor, so she will be reluctant to take a position because it is a "federal" issue. My Congressman, Lamar Smith, a Republican, actually opposes the FairTax. I have tried to find out why, but all I get from him are form letter responses. Last election he wasn't opposed, so he isn't really much interested in his constituents.
Where it might make a difference is in those races that are close -- especially those where the Democrat is challenging an incumbent Republican. If we can convince the Democrat that FairTax supporters (whom I imagine generally vote Republican) will switch if he endorses the FairTax, that would potentially make the FairTax a little more bipartisan. Of course, it might also force the Republican to endorse the FairTax.
Wouldn't it be nice to have a congressional or senate race in 2010 where both major party candidates endorse the FairTax?