CONCORD, N.H. - President Bush (news - web sites)'s New England campaign chairman stepped down Friday after the Democrats accused him of taking part in the jamming of their telephone lines on Election Day 2002. "The Democrats' allegations against me are without merit," James Tobin said in the statement. "But to avoid any harm to the campaign from their underhanded tactics, I elected earlier this week to step down from my voluntary position with the campaign." Get-out-the-vote phones run by Democrats and the nonpartisan Manchester firefighters union were jammed on Election Day two years ago by more than 800 computer-generated...