US President Barack Obama blitzed across three states Saturday in a final push to get Democrats to the polls and preserve a governing majority that is in danger of unraveling in the upcoming midterm elections, LA Times reported. Showing up in friendly Democratic cities, Obama sought to boost voter turnout by warning that hard-won initiatives passed over the last 21 months could be undone if Republicans take control of Congress in Tuesday’s elections. Tuesday’s polls are decisive on whether Obama’s Democratic allies or his Republican foes will control the Congress until 2012. All 435 House of Representatives seats, 37 Senate spots, and three dozen governorships are up for grabs, as well as control over state legislatures. Republicans, who need a net gain of 39 seats to retake the House and 10 seats to capture the Senate, are expected to swamp Democrats in a tidal wave of voter anger at the sour US economy and unemployment hovering near 10 percent.