US Democratic presidential candidate Barack Obama widened his lead over his rival, Hillary Rodham Clinton, in a latest national poll released on Monday.
The Gallup survey conducted from March 28 to 30 showed that Illinois Senator Obama beat the New York Senator in the national Democratic preferences for the nomination by 51 percent to 43 percent.
US Democratic presidential candidate Senator Barack Obama delivers a speech on the economy at Cooper Union for the Advancement of Science and Art in New York March 27, 2008. (Xinhua/Reuters Photo)
It is the fourth consecutive Gallup Poll Daily tracking report showing Obama with a significant lead.
It also marks the first time since late February that either Clinton or Obama has sustained a statistically significant lead in the race for more than two consecutive days, according to the polling body.