BostonGlobe.com Political Headlines - April 25, 2012

Here are the top POLITICAL headlines from BostonGlobe.com today  

• Obama tops among young, but less so than in 2008: Political correspondent Callum Borchers reports on the national poll that shows 18- to 29-year-old voters support Obama over Mitt Romney, but they also indicate Obama is not as popular among young voters as he was four years ago.    

• Mitt Romney launches his national campaign: Political reporter Matt Viser writes about Mitt Romney's victory rally in New Hampshire. 

• Brown, Warren commit to release their tax returns: Senator Scott Brown announced he would furnish six years' worth of filings while his leading Democratic opponent, Elizabeth Warren, agreed to release four. Political reporter Noah Bierman explains.

• Jim McGovern's flawed war: Columnist Jeff Jacoby writes about the "People's Rights Amendment," introduced by US Rep. Jim McGovern, Democrat of Worcester, that would overturn freedoms Americans have always taken for granted.  

•  A breath of fresh air on Beacon Hill: Scot Lehigh writes about Dan Winslow, a Massachusetts state representative, who has big plans for improving the state, including 16 budget amendments.