2022 Special Election

Neilson was considered for the 5th Senatorial District seat after John Sabatina resigned on December 31, 2021 after being elected to the Philadelphia Court of Common Pleas the previous month.^[5] After a meeting of Democratic leaders asked to not be considered and Ward Leaders Shawn Dillon, Connie Dougherty, Alan Butkovitz, Pat Parkinson, Jim Donnelly, Bobby Henon, John Del Ricci, Harry Enggasser, Pete McDermott and John Sabatina Sr decided to support Shawn Dillion.^[6]

Shawn Dillion failed to submit his financial disclosures which were required by law for candidacy and was forced to drop out. He was replaced as a candidate by his brother Jimmy Dillion.^[7]

2012 Special Election

In November 2011, Republican Denny O'Brien was elected to one of the Philadelphia City Council's at-large seats. O'Brien, who had comfortably held the 169th District seat in the State House for several decades, resigned from the General Assembly the following January. O'Brien's departure in part precipitated the decision on the part of the House Republican leadership to move the 169th district out of Philadelphia and into York County. The existing 169th district was to be split among the districts of Democrats Brendan Boyle, Kevin Boyle, Michael McGeehan and John Sabatina, Jr., as well as Republican John Taylor. However, the State Supreme Court struck-down the map, ruling its splitting of cities, townships and boroughs was unconstitutional. Therefore, a special election held on the existing boundaries was called for April 24, 2012.^[6][8]

Neilson entered the race to succeed O'Brien, and won the Democratic primary unopposed. In the special election, he faced Dave Kralle, a long-time aide to O'Brien who served as his Chief of Staff at the end of his legislative tenure. On election day, Neilson defeated Kralle, and will hold the seat until January 2013. He will again face Kralle in the November 2012 general election, this time vying for a full two-year term.^[6][8]

2015 Special Election

Tenure

Neilson was sworn in on May 8, 2012.^[11] He served on the Children and Youth, and Veterans Affairs and Emergency Preparedness committees.^[3]

2014 Special Election

In February 2014, former City Council Member Bill Green and was sworn in as the chair of the School Reform Commission. He was nominated by Governor Tom Corbett.^[12] In March 2014, Democratic ward leaders picked Neilson for the City Council special election that would be held in May 2014.^[13] Neilson entered the race to succeed Bill Green, and won the special election to defeat Matt Wolfe, a Republican ward leader from West Philadelphia. He later resigned the seat on June 19, 2015.

Tenure

Neilson was sworn into Philadelphia City Council on August 14, 2014 and resigned on June 19, 2015.^[15]