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Palin to embark on bus tour this weekend

Sarah Palin announced an East Coast bus tour for Memorial Day Weekend, raising questions about whether it's a prelude to a presidential run. NBC's Andrea Mitchell reports.

First came the news that Sarah Palin purchased a home in Arizona. Then came word of the glowing two-hour documentary about her record as Alaska governor. And then it was reported that she re-hired two key aides.

Now here's another sign Palin might be eyeing a White House bid: She's embarking on a bus tour this weekend.

A Palin spokesperson tells NBC News:

“Starting this weekend Sarah Palin will embark on a one nation tour of historical sites that were key to the formation survival and growth of the United States of America. The tour will originate in Washington DC. and will proceed north up the East Coast."

Of course, this doesn't mean she eventually will run. But it certainly stokes speculation about her intentions.