Sen. Lisa Boscola (D., Lehigh), whose bill has been a primary focus in part because it has support from a Republican colleague, said at the hearing that she wasn't married to any particular aspect of her proposal but believes in the importance of having an outside commission decide the lines. Without it, she said, state legislative leaders can pressure their colleagues to vote certain ways by threatening to draw them out of their districts. She said it happened to her once when she was serving in the state House, so she ran for the Senate instead.