Obama extends lead over Clinton

Barack Obama has extended his lead over Hillary Clinton in the latest results of the tracking Gallup Poll.

The poll, conducted between March 27 and 29, shows Obama on 52% compared to Clinton on 42%.

In an apparent confirmation of the result, Rasmussen have also released a poll, conducted over the previous 4 nights, showing Obama leading Clinton 47%-42%.

White males and those under 50 are strongly supporting Obama, with white women and older voters still sticking with Clinton.