A Rasmussen Reports poll released on Tuesday finds Rick Santorum leading the pack of Republican presidential candidates in Michigan. The Great Lakes State holds its primary on Feb. 28. Earlier in the day, a Mitchell/Rosetta Stone poll found Romney in the lead.

Republican presidential hopeful Ron Paul took aim at GOP rival Rick Santorum in a new ad. The ad attacks Santorums record on a host of economic issues, even hammering the former senator from Pennsylvania on abortion, insisting that he helped send taxpayer dollars to Planned Parenthood. Its a bit of a different take for Paul whose battles with Santorum in the past have been mostly over foreign policy.

With Mitt Romney having caught their candidate in Michigan, the team behind Republican presidential hopeful Rick Santorum hammered the former Massachusetts governor on Tuesday for his record on environmental issues.

A Mitchell/Rosetta Stone poll of Republican presidential primary voters in Michigan released on Tuesday finds Mitt Romney has passed Rick Santorum in the Great Lakes State, which holds its primary on Feb. 28.

Romney takes 32 percent followed by Santorum with 30 percent, Newt Gingrich with 9 percent and Ron Paul trailing with 7 percent. Twenty-two percent say they are undecided. Mitchell/Rosetta Stone polls released earlier in the month found Santorum leading by as much as 15 percent.

A poll from We Ask America released on Monday finds the two leading Republican candidates for the GOP presidential nomination dead even in Michigan heading into the state's Feb. 28 primary.

The poll of likely primary voters finds Rick Santorum and Mitt Romney each taking 29 percent. The rest of the field is far back, with Ron Paul in third with 12 percent and Newt Gingrich taking 10 percent. Twenty percent of those surveyed are undecided.

Republican presidential hopeful Ron Paul raised big bucks in January and shows no signs of slowing down.

Aaron Blake over at the Washington Post has the details of Pauls fundraising in January when the Texas congressman reeled in $4.5 million for his campaign. The Paul team is wrapping up a fundraising drive on Monday, looking to raise $2 million.

The Susan B. Anthony List (SBA List), a group of more than 365,000 members that support pro-life women in politics, announced on Monday that it was backing Rick Santorum for the Republican presidential nomination.

Republican presidential hopeful Rick Santorum ripped into President Barack Obama on Monday, responding to the Democrat incumbents calls for more manufacturing and industrial jobs in America.

Republican presidential hopeful Newt Gingrich clearly believes focusing on energy is the best way to bounce back into the race. Gingrich hammered President Barack Obama on energy last week, insisting that gas prices can get back to $2.50. The former congressional leader returned to energy on Sunday when he unveiled a new video where he speaks on the topic for almost 30 minutes.

With Rick Santorum rising in the polls, Mitt Romney is on the attack. Santorum leads Romney by 10 percent in the national Gallup tracking poll. A University of Texas/Texas Tribune poll released on Monday finds Santorum leading Romney by more than 30 percent in the Lone Star State.

Romneys camp fired away on Monday, trying to contrast their candidates record with Santorums.