On the Trail: April 3

Obama raises campaign cash; Romney closer to the nomination.

On the Trail - Rick Santorum, the GOP’s latest not-Mitt Romney, is on the rise and giving Mitt Romney a run for his money, while Newt Gingrich and Rep. Ron Paul work to stay relevant in the race and President Obama courts his base.—Joyce Jones

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The Republican presidential primary has hit the midseason point and with 572 delegates, Mitt Romney is halfway to the nomination, followed by Rick Santorum (273), Newt Gingrich 135 and Ron Paul 50. On April 3, contests will take place in Wisconsin, Maryland and the District of Columbia, where a respective 42, 37 and 19 delegates will be allocated.—Joyce Jones

Barack Obama - During a fundraising junket to Maine, President Obama accused Republicans of showing signs of madness because they want to apply old economic policies to new problems. "It was tried in the decades before the Great Depression. It didn't work then. It was tried in the last decade. It didn't work," he said. "You know, the idea you would keep on doing the same thing over and over again, even though it's been proven not to work. That's a sign of madness."(Photo: REUTERS/Larry Downing)

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Barack Obama - During a fundraising junket to Maine, President Obama accused Republicans of showing signs of madness because they want to apply old economic policies to new problems. "It was tried in the decades before the Great Depression. It didn't work then. It was tried in the last decade. It didn't work," he said. "You know, the idea you would keep on doing the same thing over and over again, even though it's been proven not to work. That's a sign of madness."(Photo: REUTERS/Larry Downing)

Rick Santorum - In a campaign ad, Rick Santorum ties his chief rival Mitt Romney to liberal policies and at the end morphs Obama’s face into Romney’s.(Photo: Scott Olson/Getty Images)

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Rick Santorum - In a campaign ad, Rick Santorum ties his chief rival Mitt Romney to liberal policies and at the end morphs Obama’s face into Romney’s.(Photo: Scott Olson/Getty Images)

Mitt Romney - It has been a pretty good week for GOP frontrunner Mitt Romney, whom establishment figures like former President George H.W. Bush, former Florida Governor Jeb Bush and Tea Party favorite Florida Sen. Marco Rubio have recently endorsed. He’s also won half of the delegates needed to win his party’s nomination.(Photo: Justin Sullivan/Getty Images)

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Mitt Romney - It has been a pretty good week for GOP frontrunner Mitt Romney, whom establishment figures like former President George H.W. Bush, former Florida Governor Jeb Bush and Tea Party favorite Florida Sen. Marco Rubio have recently endorsed. He’s also won half of the delegates needed to win his party’s nomination.(Photo: Justin Sullivan/Getty Images)

Newt Gingrich - A cash-strapped Newt Gingrich has scaled back his campaign, laying off about a third of his full-time staff and campaign director. The former House speaker plans to focus less on primary contests and more on “big ideas” like $2.50-per-gallon gas and working to personally convince delegates to back him at the GOP’s Tampa convention in August.(Photo: Chip Somodevilla/Getty Images)

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Newt Gingrich - A cash-strapped Newt Gingrich has scaled back his campaign, laying off about a third of his full-time staff and campaign director. The former House speaker plans to focus less on primary contests and more on “big ideas” like $2.50-per-gallon gas and working to personally convince delegates to back him at the GOP’s Tampa convention in August.(Photo: Chip Somodevilla/Getty Images)

Ron Paul - Texas Rep. Ron Paul says he wants to save the GOP and get it back to its roots, which is why he has no plans to exit the race despite his poor showing in primary and caucus races. While rivals Santorum and Romney focus on Wisconsin, Paul has set his sights on California, where he will hold three town hall meetings and try to raise much-needed campaign cash.(Photo: T.J. Kirkpatrick/Getty Images)

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Ron Paul - Texas Rep. Ron Paul says he wants to save the GOP and get it back to its roots, which is why he has no plans to exit the race despite his poor showing in primary and caucus races. While rivals Santorum and Romney focus on Wisconsin, Paul has set his sights on California, where he will hold three town hall meetings and try to raise much-needed campaign cash.(Photo: T.J. Kirkpatrick/Getty Images)