The good news for Rick Santorum keeps on coming. Santorum now has surged to a modest two point lead over Mitt Romney in Pew Research national Republican primary polling. The poll was conducted from February 8-12 directly after Santorum’s three big wins last Tuesday. From Pew:

Santorum is beating Romney, because he is now doing much better among more conservative voting groups. Santorum has a double digit lead among Tea Party supporters (42% Santorum – 23% Romney) and White Evangelicals (41% Santorum – 23% Romney).

Besides showing him with the national lead, the poll’s other piece of relatively good news for Santorum is that Romney does only slightly better than Santorum in a theoretical general election match up with Obama. Romney performs only two points better in the general. From Pew:

Obama leads Santorum by 10 points among all registered voters (53% to 43%) and his lead over Romney is nearly as large (52% to 44%). Romney ran about even with Obama in November and mid-January. Obama has a larger advantage over Newt Gingrich than over Santorum or Romney: Obama leads the former House speaker by 18 points (57% to 39%). Obama has made gains among independent voters. Today, 51% of independents favor Obama in a matchup against Romney, up from 40% a month ago.

Electability has always been a main selling point for Mitt Romney’s campaign. Against someone like Newt Gingrich, who has serious national imagine problems, the Romney campaign could easily make the argument to the base that nominating Gingrich would cost the GOP its one chance to beat Obama. With Romney only doing marginally better than Santorum in national polling, the electability argument becomes much hard for Romney’s campaign to make against Santorum.