Reuters - President Barack Obama's re-election campaign, worried about the influx of money to groups supporting Republican candidates, said on Monday it would start supporting the struggling Super PAC designed to help Obama stay in office.

AP - Sensing a possible threat, Republican presidential candidate Mitt Romney emphasized his social conservative credentials Monday and criticized rival Rick Santorum as an ineffective senator who previously supported pork-barrel projects as he worked to fend off an unexpected challenge in the next states to vote.

ContributorNetwork - While the counting in Nevada took longer than expected, the winner of the state's Republican caucus was no surprise. Mitt Romney, as expected, handily beat his challengers in the first Western state to vote in the nomination process. Here's a look at the numbers behind the Nevada caucus:

ContributorNetwork - COMMENTARY | If I wasn't already aware of the Republican presidential candidates now setting their sights on Colorado, the robo-calls from the Mitt Romney campaign on a Sunday afternoon, which incidentally followed robo-surveys of a political nature over the last week, would have certainly let me in on that little fact. According to the Associated Press, Romney -- galvanized by his recent wins -- is looking to hold on to his top position and build on it.

AP - Republican presidential candidate Mitt Romney says he doesn't think a prominent breast cancer charity should continue giving grants to Planned Parenthood because it provides abortion services.

ContributorNetwork - The four remaining GOP presidential hopefuls now turn their focus to the Minnesota caucus. Five states have completed the selection process for president in 2012 and Mitt Romney is the front-runner. Voice of America states public opinion polls in the state reveal any one of the candidates can win the state's caucus.

ContributorNetwork - As a member of the Church of Jesus Christ of Latter-Day Saints, Republican presidential front-runner Mitt Romney is not allowed to have more than one living wife. Not only is it illegal in the U.S., it is also grounds for excommunication from the church, which Mormons believe denies someone access to their family and to the highest heaven in the next life.

AP - Long skeptical of Mitt Romney, tea party activists are either warming up to the GOP presidential front-runner or reluctantly backing him after abandoning hope of finding a nominee they like better.

ContributorNetwork - COMMENTARY | I have said before the most logical step for Ron Paul in this year's presidential campaign would be to run as an independent. Earlier in the campaign, there were some who would have burnt me at the stake for even suggesting such a thought. The general consensus from Paul supporters is there is no way he wouldn't get the GOP nomination to run against Obama.

ContributorNetwork - COMMENTARY | Former House Speaker Newt Gingrich has found another justification for being beaten by former Massachusetts Gov. Mitt Romney -- the Mormons caused him to lose Nevada on Saturday. During Gingrich's press conference Saturday night in Las Vegas, he said that Romney had the benefit of this caucus being held in a "heavily Mormon state," as reported by Bloomberg.

Reuters - Republicans in the House of Representatives will try to force quick approval of the Canada-to-Texas Keystone XL oil pipeline using a highway funding bill, but the plan's author said on Monday there may be more than one avenue for advancing the project.

AP - Long skeptical of Mitt Romney, tea party activists are either warming up to the GOP presidential front-runner or reluctantly backing him after abandoning hope of finding a nominee they like better.

AP - Sensing a possible threat, Mitt Romney criticized Rick Santorum's time in the Senate as "not effective" because of his past support for spending on pork-barrel projects as he worked to fend off an unexpected challenge in the next states to vote.

AP - An Indiana elections official said Monday that GOP presidential contender Rick Santorum still lacks the signatures needed to make it onto the state's May primary ballot.

Reuters - Republican presidential frontrunner Mitt Romney on Monday focused his campaign's firepower on Rick Santorum to head off the former senator's surge in two of three states with nominating contests this week.

The Christian Science Monitor - A funny thing is happening on the way to Mitt Romney’s (presumed) coronation as the Republican nominee: He’s punching down at the (presumably) lowly Rick Santorum.

Time.com - Whether or not Newt Gingrich can carry on a real campaign against Mitt Romney depends in large measure on his political guardian angel, the Las Vegas casino billionaire Sheldon Adelson

AP - Republican presidential candidate Newt Gingrich says his consulting group never lobbied for clients. But his business hired state and federal lobbyists to work with clients, and some staff left to take lobbying jobs, according to lobbying disclosures and corporate reports.

AP - After losing Saturday's Nevada caucus race, Republican presidential candidate Newt Gingrich sought solace in what he called an encouraging statistic: that his supporters were turning out to vote more enthusiastically than those of his chief rival, Mitt Romney.

AP - Mitt Romney's remark that he's not worried about the very poor, the latest gaffe in a campaign rich with blunders, joins a long list of wait-let-me-explain episodes in presidential election history.