The Pittsburgh Tribune-Review is reporting that Rick Santorum’s polling in his home state of Pennsylvania has slipped to just a two-point lead.

With four weeks to go before the Penn. Primary, Santorum is nearly tied with Mitt Romney and his numbers are “slipping rapidly” the paper reports.

The poll of 505 registered Republican voters, conducted March 20-25 in conjunction with the Tribune-Review and other media outlets, shows Santorum clinging to a small lead over Romney, 30 percent to 28 percent, within the poll’s 4.2 percent margin of error.

Previous polls showed Santorum leading Romney with a 15-point advantage.

The poll shows a worsening public opinion of Santorum. His favorability rating of 54 percent is down from 65 percent a month ago, although that remains higher than the 46 percent rating for Romney, the national front-runner.

“It’s going to be pretty tough for (Santorum) to reverse this, especially given Romney’s delegate lead,” Madonna said. Romney has support from 569 delegates, more than twice as many as Santorum’s 262. The GOP nominee needs 1,144 delegates.

It is widely accepted that with the large number of delegates that Pennsylvania offers to the GOP primary winner, if Santorum cannot win his home state his campaign will be finished.

Indeed, there is something pitiful about a candidate that cannot even win his home state. Remember that Al Gore couldn’t even carry Tennessee in his 2000 campaign for the White House.

In fact, many feel that it is already too late for Santorum and that he doesn’t have a clear path to the nomination as Romney has stands at double Santorum’s delegate count already.

Calls for both Santorum and Newt Gingrich to get out of the race and leave the putative frontrunner to sail alone to the nomination from here are increasing.