It's a tactic used by political parties to redraw voting districts to give themselves an electoral advantage. Whether Republicans or Democrats control the process in a given state, the trick is to create irregularly shaped districts that segregate as many of the opposition's supporters as possible into a small handful of seats — leaving their own candidates with a much better chance of winning everywhere else. To simplify, in a state with 100,000 Democratic and 100,000 Republican voters and six districts, a GOP legislature would group 80,000 Democrats into two districts. That would leave just 20,000 Democrats spread over the other four districts, which the GOP could then easily win. This process has left most states with oddly shaped districts, often with strips of land jutting out in several directions. It's perfectly legal, unless it can be proved that districts are deliberately drawn to disenfranchise minorities — a practice outlawed by the 1965 Voting Rights Act.
House Majority Leader Rep. Dave Reed, (717) 705-7173
Senate President Pro Tempore Sen. Joe Scarnati, (717) 787-7084
Senate Majority Leader Sen. Jake Corman, (717) 787-1377