From Wikipedia:
Mississippi straddle
A Mississippi straddle is similar to a live straddle, but instead of being made by the player "under the gun", it can be made by any player, depending on house rules. House rules permitting Mississippi straddles are common in the southern United States. Like a live straddle, a Mississippi straddle must be at least the minimum raise. Action begins with the player to the left of the straddle. If, for example (in a game with $10–25 blinds), the button puts a live $50 on it, the first player to act would be the small blind, followed by the big blind, and so on. If action gets back to the straddle with no raise, the straddle has the option of raising. The player to the left of a Mississippi straddle may re-straddle by placing a blind bet raising the original straddle.Mississippi straddle.
fgmyers: As I interpret the above the answer is YES, PROVIDED your House Rules permit.
Basically the entire answer is "It depends on your House Rules".
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