Obama 's Slow Train Through Pennsylvania

In a move back to real old school politics, Barack Obama was yesterday on a slow train through Pennsylvania ahead of Tuesday's crucial primary.

Waving and talking to the many people who turned out to cheer him, Obama's train ride is amazing imagery, harking back to the grand old days of electioneering in the 19th century.

Latest polls have shown Obama gaining on Hillary Clinton in Pennsylvania, but also taking a big lead among registered Democrats across the nation.

Enjoy the slow train.