I don't think picking Missouri is a very good choice for the below reasons at this link:
1. Money lost while gambling can be recovered through civil action.
2. Gambling is considered unlawful if promoted by a person, is played by an unprofessional, more than hundred dollars are put at stake.
3. The growth of casinos in Missouri is not fully advantageous because it also has certain ill effects like the crimes associated with casinos, where innocent parties are often harmed. In fact St Louis one of the prominent cities in Missouri is considered to be the 2nd most dangerous cities in the whole of USA, and this is primarily due to casino crimes. There are also other felonies like gambling corruption where insiders get benefited by corrupt practices. Also underage gambling is becoming a big problem in Missouri and experts say this can soon lead to addiction.
4. International Lottery and
Internet gambling is strictly prohibited
http://www.missourigamblingforum.com/
I can't see any elected representative from Missouri no matter their party afilliation doing anything other than taking your money and smiling all the way to Washington DC.