BOSTON (AP) — President Barack Obama doesn’t have any competition in next month’s Massachusetts Democratic presidential primary, but that isn’t stopping campaign workers from using the balloting to rally supporters.

Obama for America-Massachusetts has scheduled what it calls a “weekend of action” to reach out to voters.

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On Saturday and Sunday the campaign has scheduled dozens of events across the state, including voter registration drives, door-to-door canvasses and phone banks.

In an e-mail to supporters, Obama for America Massachusetts State Director Carl Nilsson said Bay State residents will play a special role in this year’s presidential contest, especially if former Gov. Mitt Romney becomes the Republican nominee.

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Nilsson said Massachusetts voters have seen firsthand how Romney has changed his position on key issues.

Polls show Obama remains popular among Massachusetts voters, who backed him in 2008.

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Copyright 2012 The Associated Press.