Heat is on Obama ahead of Oval Office speech tonight

(CNN) – It's day 57 of the Gulf oil spill and maybe the most pivotal day for President Obama. Tonight, for the first time, he'll address the nation from the Oval Office – the most symbolically powerful setting at his disposal – to try and convince the American people that he's doing everything he can to stop the worst oil spill in American history.

New poll numbers show he has a lot of convincing to do. A USA Today/Gallup poll taken over the weekend shows 71% of those surveyed said the president hasn't been tough enough on BP. Half of respondents think some of the beaches affected will never recover.

And today, there's new evidence that BP put money ahead of safety, allegedly taking cheaper, riskier shortcuts on the well that has been spewing oil from the ocean floor for eight weeks. Our Ed Henry reports on some of the themes we can expect the president to touch on in his speech tonight.