My view on the so-called "social issues" is to leave such matters entirely up to the states in the manner of our original federal system.
The federal government has no role to play in social issues. If you have read some part of the Constitution that authorizes the federal government to get involved in issues of marriage or outlawing the sale of plant extracts (aka the War on Drugs), please let me know.
Under the confederated system the Founding Fathers originally envisioned, each state would choose its own way of dealing with social issues. Gay marriage, for example, might be state-sanctioned in California and Massachusetts; forbidden in Louisiana and Kansas; and left entirely to the discretion of churches in Missouri and Minnesota.