A Maine man who used a racial slur and suggested shooting President Obama in a Facebook post has resigned from all boards and committees on which he serves in the town of Sabattus. David Marsters submitted his resignation in an e-mail in which he apologized for the comment. The resignation was sent hours before selectmen were to meet Thursday evening to consider removing Marsters from all positions he held in the town. However, Marsters said he still intends to run for selectman. Marsters was interviewed by the US Secret Service.