Ah so you would want the Democrats to nominate a man who is far from the party mainstream just so you can appeal to the masses. That is when I know the party system has failed. I wish both parties would just nominate people who support the views of their party not some moderate who has the best chance of winning.
I dare say Democratic voters, as a whole, are moderate rather than liberal, which makes Bayh more representative of the Democratic electorate than many prominent liberals within the Democratic Party (hence Bayh is mainstream) Even Hillary is running to the centre, but Bayh's the more genuine article.
Moderates are the single largest plurality of the US electorate. The future of the Democratic Party lies in the ideological centre. My vision in one where a moderate majority governs in the interests of all Americans and not merely the left and the right
Dave