Three more polls of likely Pennsylvania primary voters were released today - each showing Hillary Clinton with a substantial lead:
American Research Group (April 20-21, 600 LV): Clinton 56%, Obama 40%
Zogby (April 20-21, 675 LV): Clinton 51%, Obama 41%
InsiderAdvantage (April 21, 712 LV): Clinton 49%, Obama 42%
Smart Politics will blog live Tuesday night as the Pennsylvania primary results come in. In addition to real-time reporting of results and media watchdog commentary, Smart Politics will examine the impact of the results on the upcoming primary contests.
Live blogging will commence at 7 p.m. CST when polls close.