The fact is that Paul is not doing this to make the republican tent bigger...he is doing this because he believe this is the right thing to do. The fact is that legalizing drugs will not make fewer drug addicts. keeping gay marriage illegal will not stop gay marriage from being the norm in 5 to 8 years in just about every state. I hate drugs and I am a straight edge conservative christian, but I believe in limiting government as much as possible.
The point that some have discussed is very important though. If we legalize drugs, are we going to formally socialize the cost of addiction? Will health plans be required to cover drug rehab? If we legalize same sex marriage nationally, can churches have their non-profit exemptions taken?