I'd use the fact that the Dems stalled Bolton as proof that further funding should be cut, since they don't think filling that position is all that important.
I know that a couple of weeks ago a Republican representative was trying to pass a bill that would reduce the UN dues the US would pay at least until they released all of the records, and submitted to subpoenas re: the OFF Scandal...
I don't think that it passed, but I will have to check.
Here is a bill that passed in the House, but as far as I can tell, it hasn't been before the Senate yet...http://thomas.loc.gov/cgi-bin/bdquery/z?d109:HR02745:@@@L&summ2=m&