Some observers of texas politics argue that potential voters feel discouraged by perceived insulation of elected officials and believe that the real brokers of politics and public policy in texas are

The answer is "Interest groups and campaign donors".

Most interest groups can't lawfully urge their individuals to vote in favor of or against a specific hopeful, however they can accomplish a similar impact by educating their individuals from applicants' positions on issues.  

Politicians officials likewise tune in to individuals and gatherings who can give heaps of cash. Interest groups are not permitted to give cash to crusades specifically, but rather they can contribute cash through their Political Action Committee (PAC).