BostonGlobe.com Political Headlines - September 27, 2012

Here are the top POLITICAL headlines from BostonGlobe.com today:

• Obama's stance on natural gas carries risks: President Obama's pursuit of natural gas production risks alienating a component of his base and may oversell the potential for new jobs. Washington bureau chief Chris Rowland reports.

• Brown, Warren share centrist view on many foreign policy matters: On flashpoints such as Syria, Russia, Iran, and Israel, Scott Brown often rejected Mitt Romney's views and joined Elizabeth Warren in embracing the policies of Barack Obama. Globe State House reporter Michael Levenson outlines.

• Why is Joe Kennedy III limiting debates?: Kennedy has agreed to three debates with Sean Bielat in their race to replace Barney Frank in the US House, despite Frank's participation with Bielat in nine debates two years ago. Globe columnist Joan Vennochi explains.

• Group seeks US inquiry of Romney's filing on Bain: A group of Democrats has asked the Department of Justice to investigate whether Mitt Romney violated federal law by stating that he was not involved with Bain Capital "in any way'' after 1999. Washington bureau chief Chris Rowland covers.

• On eve of debate, Rep. John Tierney releases tax returns: Tierney released six years of tax returns showing that he and his wife, Patrice, reported annual income averaging $180,957 and paid federal income taxes averaging $26,561. Globe reporters Brian C. Mooney and Michael Rezendes detail.

• Barney Frank says Mitt Romney's election would be 'serious setback' for LGBT community: Rep. Frank makes comments on a video as part of the "Mitt Gets Worse" project. Globe correspondent Callum Borchers elaborates.