AP:

Houston tea party group King Street Patriots, started by Catherine Engelbrecht, has been the focus of a longstanding lawsuit by the Texas Democratic Party accusing the organization of violating state campaign finance laws by engaging in political behavior when it dispatched poll watchers on behalf of the Texas Republican Party during the 2010 election. Democrats have used the case to press for disclosure of the group’s donors.

But the nonprofit, represented by attorney James Bopp Jr., architect of the landmark Citizens United case that opened the door for corporations and unions to make unlimited independent expenditures in U.S. elections has fired back with a counterclaim challenging numerous provisions of Texas campaign finance law. The case has played out for years in Texas courts on whether key components of the state’s campaign finance and disclosure system are constitutional.