JHyre,
When you refer to the similarity of Brown, Clegg, and Cameron, do you mean their personalities or party policy platforms?

Have you read their party manifestos? There are fundamental policy differences between the three parties. Whereas, there is almost no substantive policy differences (just matters of degree) between the Democrats and Republicans, exempt at the margins of their respective party representatives in Congress. Mort Sahl's satirical quip is as accurate today (as when he said it in the early 60's) that the major difference between the Democrats and Republicans is in the spelling.
As to their personalities, as they say where I grew up, they're as different as chalk and cheese.
