Delph (born January 12, 1970) is a former Republican member of the Indiana State Senate representing the 29th district from 2005 to 2018.
He is considered to be a "socially conservative Republican," who has courted support from the Tea Party movement.Delph is known for his immigration legislation and his support for an Indiana Constitutional amendment that would ban same-sex marriages and civil unions.
He is frequently mentioned and has shown interest in representing Indiana in statewide office or in US Congress.
On November 6, 2018, Delph lost reelection in the State Senate to J.