Peter Overby

If you thought the presidential primaries were extraordinarily negative, now there's statistical evidence that you were right.

A new analysis of TV ads finds that 70 percent of the messages were negative — a trend spearheaded by the heavily financed superPACs supporting the candidates. At this point in the 2008 election, 91 percent of TV ads were positive.

Newt Gingrich is officially out of the presidential race. The former House speaker said Wednesday that he's suspending his campaign, and he's ready to help the presumptive Republican nominee, Mitt Romney, battle President Obama. But Gingrich might have a more pressing problem: His campaign has about $4 million in debt.

In Gingrich's exit speech, he opened by thanking people — first his family, then his financial backers.

"I also want to single out, first of all, the over 179,000 donors who helped us at Newt.org and who helped make the campaign possible," he said.

Every presidential nominee going back to 2000 has revealed the names of influential supporters known as "bundlers" because of the way they persuade others to give money to a candidate. Every nominee, that is, until Mitt Romney.

The most anyone can give directly to any presidential campaign is $5,000, and everyone who gives that much is listed in the Romney campaign's monthly disclosures.

When it comes to the bundlers, though, the campaign chooses to keep those names secret.

Voluntary Disclosure

The White House has been fielding questions lately about President Obama's travel — what's official, what's political and whether taxpayers are getting stuck with the bill. It's the same issue that rolls around every time a president runs for re-election.

Take President Obama's trip to Florida earlier this month. It featured an official presidential speech on the economy at Florida Atlantic University. On the same trip, the president hit two fundraisers.

How do you sort that out?

The latest financial numbers are coming out Friday from the campaigns of President Obama and Republican presidential candidate Mitt Romney — along with the superPACs that love them.

First, the easy numbers: $53 million was raised in March to re-elect Obama and $12.6 million was raised by the Romney campaign to win the Republican primaries.

But those easy numbers don't give a complete picture.

Yum Brands, the company that owns Taco Bell and Pizza Hut, says it's the latest corporation to break ties with the American Legislative Exchange Council — a group that brings state lawmakers and corporate lobbyists together to write legislation.

Liberal groups are pressuring corporations to abandon ALEC, and a dozen companies have now dropped out.

This week, ALEC did some damage control. It said it is shutting down its task force on public safety and elections, which wrote controversial measures on voter ID, "stand your ground" and immigration reform.

Two of America's best-known companies, Coca-Cola and PepsiCo, have dropped their memberships in the American Legislative Exchange Council, a low-profile conservative organization behind the national proliferation of "stand your ground" gun laws.

As Mitt Romney decisively won the Illinois Republican presidential primary Tuesday night, financial reports filed at the Federal Election Commission showed that Romney and a superPAC supporting him yet again spent more than all of his GOP opponents combined.

The reports cover the month of February, which started with Romney's win in Nevada and ended with contests in Michigan and Arizona, which the former Massachusetts governor also won.

In between, former Pennsylvania Sen. Rick Santorum took three smaller states.

One of the defining elements of the 2012 presidential campaign is money. Not that the candidates themselves have raised all that much; except for President Obama, they haven't. But two dozen wealthy Americans have put in at least $1 million each.

Mostly, they're a mix of Wall Street financiers and entrepreneurs. One of the biggest donors is Sheldon Adelson, a casino magnate who is worth about $25 billion.