With his bid for the Republican presidential nomination floundering, Newt Gingrich, who is now dealing with a campaign shake-up and laying off staffers, weighed in on the Supreme Court listening to oral arguments on a challenge launched by Florida and 25 other states against the federal health-care law signed by Barack Obama in 2010.

Quinnipiac University released a poll on Wednesday showing Barack Obama ahead of the two leading Republican presidential hopefuls in Florida.

The poll shows Obama beating Republican hopeful Mitt Romney in Florida, with the Democrat incumbent taking 49 percent and the former Massachusetts governor following with 42 percent. Obama does better when matched up against Rick Santorum, taking 50 percent, while the Republican follows with 37 percent.

Wisconsin is the big prize up for grabs Tuesday as the Republican presidential hopefuls battle in primaries there and in Maryland and the District of Columbia. A poll released by the Marquette Law School on Tuesday finds that Mitt Romney has a solid lead over Rick Santourm in the Badger State.

The poll has Romney ahead of the pack with 39 percent followed by Santorum with 31 percent. Ron Paul is a distant third with 1 percent while Newt Gingrich is floundering in Wisconsin with 5 percent.

On Tuesday, Republican presidential candidate Mitt Romney received a major endorsement in Pennsylvania -- the home state of Rick Santorum, his main rival for the GOP nomination. U.S. Rep. Mike Fitzpatrick, R-Pa., announced that he was backing Romney. Like Santorum, who was defeated by current U.S. Sen. Bob Casey, D-Pa,, Fitzpatrick lost his seat in 2006 but he would rebound to reclaim it in the 2010 elections.

As gas prices continue to rise, a poll from Rasmussen Reports released on Tuesday finds that a plurality -- 48 percent of American adults -- want to see the federal government temporarily remove the federal gas tax until prices are lower.

While 12 percent are not sure, 40 percent think the federal gas tax should remain in place at this time.

The poll of 1,000 adults was taken March 24-25 and had a margin of error of +/- 3 percent.

The federal fuel tax is 18.4 cents per gallon for gasoline and 24.4 cents for diesel fuel.

California, here they come.

While the California Republican presidential primary is not until June 5, the Golden State is the largest electoral prize on the map and is bringing a whopping 172 delegates to the Republican convention in Tampa come August.

There are signs this week that the Republican presidential hopefuls are starting to focus on California.

The two leading candidates for the Republican presidential nomination -- Mitt Romney and Rick Santorum -- continue to fight over conservative credentials.

On Tuesday, the Romney camp took aim at Santorums record, insisting that conservatives cannot trust the former U.S. senator from Pennsylvania.

Veteran Florida Republican leader Al Cardenas, formerly with the Republican Party of Florida and now the chairman of the American Conservative Union, announced on Monday that he is backing Mitt Romney for the Republican presidential nomination.

Mike Lee became a favorite of the tea party movement back in the 2010 cycle when he defeated longtime incumbent U.S. Bob Bennett for the Republican nomination in Utah. On Monday, Lee announced that he was backing Mitt Romney for the Republican presidential nomination.

After his poor showing on Saturday in the Louisiana primary, Republican presidential hopeful Newt Gingrich is looking to get back on track in Wisconsin.

Gingrich is going all out in the Badger State which holds its primary next Tuesday -- the same day as Maryland and the District of Columbia. Callista Gingrich is hitting Hudson and Eau Clare on Monday while the candidate himself makes a blitz of national media appearances and campaigns in Delaware.