Politics Today is CBSNews.com's inside look at the key stories driving the day in Politics, written by Kevin Hechtkopf:
**Mark Sanford's shocking revelation of an affair…
**President Obama tries to focus on health care…
**Immigration reform on tap for today…

(AP Photo/Mary Ann Chastain)
Gov. Mark Sanford: The revelation that shocked the political world yesterday came from South Carolina, when the governor admitted that he had an affair.
"I've been unfaithful to my wife, and I developed a relationship with what started as a dear, dear friend from Argentina," Gov. Sanford said during a press conference in the state capital of Columbia.
Sanford had returned to South Carolina from a trip to Buenos Aires on Wednesday morning, and even before the admission of an affair he was the talk of the town for being mysteriously out of pocket for almost a week. He had left last Thursday without telling anyone where he was going, and even misled his staff to think he was going hiking on the Appalachian Trail.
"I've let down a lot of people," Sanford said. "That's the bottom line."
Now the question becomes whether the governor can survive the scandal. While his national aspirations for higher office are clearly over, his spokesman said Sanford had no plans to resign his post as governor. However, he did resign his post as chairman of the Republican Governors Association.
"Though Sanford frequently has fought with lawmakers, state leaders largely held their fire Wednesday," writes
Clif LeBlanc And John O'Connor in The State newspaper.
"But some said the governor's actions were unacceptable. He left the country and deliberately made himself unavailable ... he misled his staff who unknowingly misled the public," Senate Majority Leader Harvey Peeler said in a statement. "We cannot let the Governor’s personal life overshadow his public responsibility, or in this case, his negligence of gubernatorial authority."
"Others reiterated the need to clarify state law about when a governor should hand over power if traveling, ill or disabled. Some are wondering if Sanford now lacks the standing to lead the state during a troubled economy and should resign. 'The state needs someone who can be effective,' said Greenville-based consultant Chip Felkel. 'I don’t think Mark can be effective at all.'"
"Those who've worked in previous gubernatorial administrations say the fallout from Sanford's bizarre Appalachian Trail hike-turned-Argentine tango will be significant, long-lasting and extended," writes
Robert Behre and Schuyler Kropf of the Post and Courier in Charleston.
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