Preliminary election returns show these national totals for each party, in the November 2010 election, for the office at the top of the ballot. “Office at the top of the ballot” means Governor. If a state had no gubernatorial election, it means U.S. Senate. For the four states that had neither a gubernatorial nor a U.S. Senate election, it means U.S. House of Representatives.
The 2010 results are: Republican 49.1%; Democratic 45.6%; independent candidates 1.2%; Libertarian 1.1%; Constitution 1.0%; Green .6%; all other parties 1.4%.
By comparison, the 2006 results for the office at the top of the ballot were: Democratic 49.3%; Republican 45.7%; independent candidates 2.2%; Green 1.2%; Libertarian 1.0%; Constitution .2%; other parties .4%.
Compiling these number, totals for non-Democrat/Republican: 5.0% in 2006 5.3% in 2010.
Among those, the Libertarian and Constitution Parties did better this year than four years ago, while the other alternative choices did worse.