<p>WASHINGTON — House Democrats have declared war on the Republican leadership, vowing to gum up the legislative process in retaliation for what they say is systematic and unfair treatment by the majority. “Our bag of tricks is somewhat small, but we will continue to use it,” said Stacey Farnen, spokeswoman for House Minority Whip Rep. Steny Hoyer, D-Md. “There are some more dramatic ways we can express ourselves.”</p>