"To investigate the legislature" means to carefully examine or look into the actions and decisions made by the lawmakers and politicians who represent the government. Full definition
Their attorneys are arguing that it's unconstitutional for the governor to directly investigate the legislature and it violates the separation of powers. (wrvo.org)
Cuomo appointed a Moreland Act Commission to essentially investigate the legislature and those probes are ongoing, setting up a potential conflict between the governor, the Senate and Assembly as 2014 begins. (wrvo.org)
The panel had begun investigating the legislature, but Cuomo disbanded it as part of a budget deal. (wxxinews.org)