Oroho served as State Senate Minority Leader after being elected during a State Senate Republicans Caucus meeting, replacing Thomas Kean Jr.[1] Oroho announced in January 2023 that he would not seek another term in the November 2023 general election.

With Littell's endorsement, he ran in a competitive primary against Assemblyman Guy Gregg.

[8] Oroho opposes same-sex marriage and has been the senate sponsor of legislation that would allow a public vote in the form of a ballot question to determine whether it should be legalized or banned in New Jersey.

In June 2009 he was one of seven senators to vote against putting open space bond question on the November ballot.

[11] He served on the Franklin Borough Council from 2001 to 2006 and on the Sussex County Board of Chosen Freeholders from 2005 to 2007.