How the GOP can keep control of Congress after the 2018 midterms

"What does the GOP need to do in order to keep control of the House and Senate?"

The Washington Examiner asked that question to about a dozen conservative operatives, campaign hands, political scientists, and commentary writers as both parties prepare to do battle in this year's midterm elections.

At this point, history and numbers are working against the Republicans.

The president's party has lost congressional seats in 18 of the last 20 midterm elections. Dating back to 1946, the average loss of House seats rises to 36 when the president's job approval rating is below 50 percent, as President Trump's has been since taking office.

In the House, the Democrats need to pick up 25 seats. Republicans hold more competitive or toss-up seats than the Democrats and represent 23 districts won by Hillary Clinton.