Former Alaska Gov. Sarah Palin (R) has issued what may be a tacit endorsement of Christine O'Donnell, the Tea Party-backed outsider running against Delaware Rep. Mike Castle (R) in the state's Republican Senate primary.

Palin, a frequent Twitter user who has been known to discuss endorsements on her feed, retweeted a message Wednesday from conservative radio host Tammy Bruce in which Bruce called O'Donnell "great."

"Her election must [be] a major focus for us all," Bruce wrote of O'Donnell. 

After Palin's retweet, that same message was distributed to her 244,000-plus followers.

The move has observers scratching their heads; while a retweet may not amount to an official endorsement, Palin's mention of O'Donnell comes pretty close.

O'Donnell staffers, unsure how to interpret the tweet, are still not treating it like one.

"We would be honored and humbled by Sarah Palin’s endorsement," O’Donnell spokesman Matt Moran told The Wall Street Journal on Wednesday.

The primary is Sept. 14.