Proposition A is a measure about gambling and casinos. Salva and Knight want the proposition removed from this November's ballot altogether.

Under Proposition A, the state would limit casino licenses to 13, raise taxes on casinos by one percent, and use the extra money to fund elementary and secondary education.

The measure would also repeal the $500 loss limit.

Salva and Knight say combining these issues into one measure presents a conflict for voters. Carnahan's lawyers say it's too late to change the ballot.

"It's very late and that's one of the issues we raised, waiting to advance the lawsuit until now at this stage is very confusing to the voters. Some voters have already voted absentee. There are people who have already voted for Proposition A and their vote should count," said Chuck Hatfield, who supports Prop A and is one of Carnahan's lawyers.

Democratic Representative Ray Salva of Sugar Creek disagrees.

"When a person goes to the polls to vote, they should have the confidence that what they're reading is the truth. In this case it's not the truth, it's not factual."

Sept. 26 was the first day Missouri absentee voters could cast their ballots. A decision on whether Proposition A will be on the November ballot is expected Friday.