Republicans control the House by a majority of 234 to 207. Most experts say they will still be in charge after the November election.
The Democrats control 55 seats in the 100 member U.S. Senate. A change of six seats will put the Republicans in charge.
Which party is worried and why?
The Democrats are worried. Off-year elections usually help the party that is not in charge of the presidency.
Experts say voter turnout will be important. It always is. In 2012, Latinos, Asians, blacks, younger voters and women helped elect President Obama. These voters tend to vote less in non-presidential election years.
Experts are talking about Hispanic voters. They say Latino voters are disappointed in the progress of immigration reform. The Senate has passed an immigration reform bill. The House has not.
Latino voters, however, are beginning to be angry with President Obama for not doing more to help immigrants. It does not seem they plan to vote for Republicans. It seems they plan to not vote at all. This will hurt Democratic candidates.
Advocates think that the president can do more. They cite the Deferred Action for Childhood Arrivals order. They believe he should stop all deportations of undocumented people who have no serious criminal charges against them.
The president says he cannot do more. And if he does, the House will not pursue immigration reform.
Latino advocates are urging Latinos to vote. They believe the long game involves political activity.
Source: The New York Times March 31, 2014