Some two dozen Democratic incumbents were in jeopardy, but just four Republicans faced competitive races. Republican victories in the latest midterm elections in 2010, fueled by the rise of the ultra-conservative tea party, gave the party the advantage in redrawing congressional districts. 
 
The president's party typically loses seats in midterm elections, but Obama's low approval ratings around 40 percent have been a drag on Democrats, along with public unease with the Islamic State group threat, the Ebola outbreak and a lackluster recovery from the 2008 recession. Promising economic signs of a drop in the unemployment rate and cheaper gasoline have failed to help.
 
The election is certain to provide surprises, with Republicans and Democrats pointing to the high number of undecided voters in the closing days. 
 
The Republicans were likely to match the 246 House seats of 1947-1949 when another Democrat, Harry S. Truman, occupied the White House. Democrats still hold the modern-day edge for most seats _ 292 _ in 1979.
 
Republicans purposely lowered expectations at a gain of five to eight seats, but privately some said anything less than a net of a dozen seats would be a disappointment.
 
A solid Republican majority means Speaker John Boehner can afford defections from his increasingly conservative caucus and still get legislation passed. Republicans are counting on partnering with a Republican-led Senate.
 
Obama, whose party lost 63 seats in 2010, would become the two-term president with the most midterm defeats, surpassing Truman's 74.  (AP)