Clinton maintains lead over Sanders in Pennsylvania primary polls

Source:  Real Clear Politics

Other state polls:
Trump, Cruz, Kasich listen to their engines idle in Pennsylvania.  (4/21/2016)
Preview of Maryland presidential primary races.  (4/20/2016)
Latest California primary polls give front runners a bump.  (4/17/2016)
Donald Trump's Joe Paterno meltdown moment in Pittsburgh.  (4/14/2016)
Presidential primary focus moves East: A look at latest polls from NY and PA.  (4/7/2016)
Trump continues to hold onto a slim lead in GOP California primary polls.  (4/5/2016)
Latest GOP Pennsylvania primary poll shows tight race between Trump and Kasich.  (3/24/2016)