Chris Christie will reportedly make 2012 decision this week

Chris Christie will reportedly make a decision this week about whether to run for the Republican presidential nomination.

After his speech at the Reagan library in California last week, Christie has kept a low profile amid the reports he's seriously rethinking his pledge not to run for president in 2012. But that hasn't stopped sources close to the New Jersey governor from leaking out details about the governor's thinking.

Over the weekend, unnamed advisers told the New York Times that Christie is looking at how quickly he could launch a full-fledged campaign operation—or whether his late start would be a detriment to his bid.

Unnamed sources tell ABC News's Jonathan Karl a network of big donors is "teed up" to support Christie's bid, but they've so far heard nothing from the governor's team beyond that his decision will come early this week.

Meanwhile, NBC's First Read reports that Christie's team has asked several prominent Republicans who were close to endorsing other candidates in the 2012 race to hold off until Wednesday—a sign the governor could announce his decision within the next 24 hours.

Christie's advisers are said to be worried about how some of the governor's political positions, including his belief that global warming is real, will play with conservative primary voters.

But The Iowa Republican's Craig Robinson argues Christie's "straight talking, no-holds barred approach of tackling controversial issues and political opponents head-on" could trump concerns over his conservative credentials, especially in Iowa.

"Iowa might be the one early state that is the most open to a newcomer to the race," Robinson, a former political director at the Iowa state Republican Party, writes. "While it would not be easy and would require a time commitment, Christie could carve out a win in Iowa, and if he does that, he may roll over the rest of the field."

Meanwhile, Mike Dennehy, a longtime New Hampshire political operative who advised John McCain's presidential bids, sees an opening for Christie in the Granite State--as long as he jumps in soon.

"Given the slow start to the campaign, even the newest entry to the race, Rick Perry, has yet to spend a great deal of time in New Hampshire so a compelling figure like Gov. Christie could make a big impact," Dennehy tells the Washington Post's Chris Cillizza. "There is a sizable portion of elected officials and activists who have yet to sign on with a candidate but the time to influence them is rapidly closing because it doesn't happen overnight."