President Obama faces rising political heat over the economy, federal spending and the Gulf oil spill, complicating the Democratic Party's chances in mid-term elections.

President Obama speaking during visit to Strasbourg, France

A new NBC News/Wall Street Journal poll shows Mr. Obama's approval rating dipping to 45 percent in June, from 50 percent in May. Recent election history shows that presidential approval of 50 percent or higher is critical for the party in power to avoid major mid-term losses in Congress.