Question: In the US Senate, in 2012, who replaced an American veterinarian and former politician based in Las Vegas, Nevada?

<P0-S0> The 2012 United States Senate election in Nevada was held on Tuesday, November 6, 2012, alongside 33 other elections to the United States Senate in other states, as well as elections to the United States House of Representatives, and the 2012 United States presidential election. <P0-S1>  Incumbent Republican U.S. Senator Dean Heller, who was recently appointed to this seat left vacant by resigning U.S. Senator John Ensign, was narrowly elected to his first full term over Congresswoman Shelley Berkley. <P0-S2>  The primary election was held June 12, 2012. <SEP> <P1-S0> Poppermost is an original indie pop rock music band based in Las Vegas, Nevada, United States. <P1-S1>  The retro band draws comparisons to The Turtles, The Beach Boys, Harry Nilsson, Simon & Garfunkel, The Beatles, Queen, Elliott Smith, Elvis Costello, The Kinks, Paul McCartney, The Hollies, Traveling Wilburys, Oasis, The Who, Electric Light Orchestra, Wilco, and classic '60s / '70s pop rock radio. <P1-S2>  Poppermost has been listed as one of "Our picks for the best bands" by the "Las Vegas Weekly" entertainment magazine, and also received a "Best of Las Vegas 2007" award from the "Las Vegas Review-Journal" newspaper. <P1-S3> <ref name="RJ3/25/07">"Best Local R&B Band", "Las Vegas Review-Journal"</ref> Singer/songwriter/multi-instrumentalist, Alex Oliver, and bassist and audio/video/graphics/web designer, Roy Rendahl, both registered with ASCAP, started Poppermost on July 4, 2001. <P1-S4>  They have released three full-length albums, and several CD singles and EPs of original music, all recorded at Roy's Trimordial Studio in Las Vegas. <P1-S5>  Roy is now mastering their latest recordings too. <P1-S6>  Poppermost's influences include: The Beatles, R.E.M., The Beach Boys, Queen, Wilco, Oasis, classic '60s AM and '70s FM, The Who, Carole King, and Burt Bacharach and Hal David. <P1-S7>  The Poppermost name originates from the early Beatles' inspirational call and response, John: "Where are we going, lads?" <P1-S8>  Paul, George, Ringo: "To the toppermost of the poppermost, Johnny!" <SEP> <P2-S0> Patricia Ann "Pat" Spearman (born in 1955) is an American cleric, veteran, and Democratic politician from North Las Vegas, Nevada. <P2-S1>  She was elected in November 2012 to the Nevada Senate representing District 1, that is composed of the northern section of North Las Vegas and slivers of neighboring jurisdictions, after defeating incumbent John Jay Lee in the primary, and winning the general election. <P2-S2>  Spearman became the first openly lesbian member of the Nevada Legislature. <P2-S3>  She was re-elected in November 2016, and serves as co-majority whip since. <P2-S4>  Regarded as one of the most liberal members of the Nevada Senate, Spearman has introduced bills that provide equal pay for women, support LGBT rights, and support veterans. <P2-S5>  Moreover, she was involved in the process of establishing the Nevada Revenue Plan during the 2015 session. <SEP> <P3-S0>  He was a Congressman and United States Senator from Nevada, serving in the latter seat from January 2001 until May 2011. <P3-S1> John Eric Ensign (born March 25, 1958) is an American veterinarian and former politician based in Las Vegas, Nevada. <P3-S2>  He resigned amid a Senate Ethics Committee investigation.