Actor, politician and bodybuilder Arnold Schwarzenegger is raising money for a group that wants to change the way Missouri draws political maps.

Schwarzenegger, who was California's Republican governor from 2003 to 2011, announced that a Missouri redistricting reform measure is one of four initiatives for which he is raising money in order to "terminate gerrymandering."

Posting on Twitter, Schwarzenegger described Amendment 1, or "Clean Missouri," as "a big-thinking initiative to make politics more transparent and responsive to the people, including fighting gerrymandering."

Amendment 1 will put five proposals before Missourians in November. The measure would:

Explicitly make legislative records subject to the Sunshine Law

Tighten limits on campaign contributions

Restrict lawmakers from becoming lobbyists for two years after leaving office

Limit gifts from lobbyists to lawmakers

Change how Missouri's statehouse districts are determined

It's this last proposal that has Schwarzeneggar's eye, and it's this part of Amendment 1 that has Missouri Republicans concerned that the measure could shift the balance of power in Jefferson City toward Democrats. Those concerns are fueled by Clean Missouri's funding, which includes large checks from unions and Planned Parenthood affiliates as well as $250,000 that came from a group linked to liberal billionaire George Soros.

Amendment 1 would empower a "non-partisan state demographer" to draw legislative maps. The position would come after nominations from the state auditor, a partisan office, and approval by the top Republican and Democrat in the state Senate.

The proposed amendment would require that legislative districts "shall be designed in a manner that achieves both partisan fairness and, secondarily, competitiveness," meaning that "parties shall be able to translate their support into legislative representation with approximately equal efficiency" and that parties' representation "shall be substantially and similarly responsive to shifts in the electorate's preferences."

Plans submitted by the demographer would need to ensure that as few votes are "wasted" as possible. Districts would still be required to be contiguous and compact, but the partisan fairness and competitiveness requirements would take precedence.

A bipartisan commission would continue to review districts and could make changes to statehouse maps.

Speaking next to a robot with glowing red eyes, Schwarzenegger added that one lucky donor would win a trip to Budapest to the set of his newest movie in the "Terminator" film franchise, in which Schwarzenegger plays a human-like machine intent on preventing the rise of "the Resistance."

Schwarzenegger also is raising money for initiatives in Michigan, Colorado and Utah.