It attracts both coastal liberals and centrists in some of Capitol Hill's toughest election-year battles. It was the highest-rated message tested by two top Democratic advisers looking to guide their side of the aisle through a spring of bruising combat over gas prices. But how much more loudly can -- or should -- Democrats call for slowing down or blocking exports of domestically produced oil and gas, especially when overseas fuel sales are helping President Obama approach his goal of doubling U.S. export growth by 2015? Go to story #1