WASHINGTON -- Sen. John McCain was in Las Vegas Wednesday and Sen. Barack Obama came back to Chicago after a big night out West.

It looked like a Hollywood premiere, but instead it was a Hollywood fundraiser for Obama that pulled in about $5 million, according to Democratic officials.

Meanwhile, the Illinois senator directed his finance team to help former rival Sen. Hillary Clinton pay off at least $10 million in campaign debt.

It comes days before the two hold a meeting with donors in Washington and make a joint appearance in unity in New Hampshire where they split the vote during the primary.

Amid cheers and a horde of media, Clinton stayed on message as she returned to her day job in the Senate.

"If you care about the issues I care about, then you really have to stay with us in the Democratic Party and vote for Senator Obama," Clinton said.

Chastising Obama for foregoing public financing, McCain put out a new ad and traded jabs once again with his opponent on the issue of energy.

"John McCain still doesn't get it," Obama said.

Speaking alongside California's Gov. Arnold Schwarzenegger, who opposes McCain's offshore drilling plan, McCain called for greener government, pushing for federal buildings and cars to be more energy efficient.

"Put the purchasing power of the U.S. government on the green side of technology," McCain said.

The Obama campaign put out a response to McCain's latest proposal saying that his plans are a gimmick. The McCain campaign disputes that, calling Obama "Doctor No" on energy policy.

On the energy issue, some of the major differences between McCain and Obama in addition to supporting offshore drilling, McCain also supports a gas tax holiday and this week he proposed a $300 million prize to develop new battery technology.

Obama wants to tax oil companies' windfall profits and he wants to crack down on oil market speculators. He also supports a second economic stimulus package for families to deal with soaring energy costs.

There has been a lot talk about Obama and Clinton teaming up this week. But what about her husband, Bill?

Obama said he's going to need help from both Clintons in the general election, including the former president. Bill Clinton has not come out and officially endorsed Obama. But his office did put out a statement saying that he is "committed to doing whatever he can" for Obama.

Checking in on the latest numbers on the Gallup Polls, Obama is running slightly ahead of McCain 46 percent to 43 percent. The margin of error is plus or minus 2 percent.