What if Republicans lose both House and Senate?
WHAT IF REPUBLICANS LOSE BOTH HOUSE AND SENATE? The odds are Republicans will lose control of the House in the coming midterm elections, for five reasons: 1) their current majority is so narrow that losing a literal handful of seats would cost them control; 2) they will be hurt by President Donald Trump’s low job approval rating, especially on his handling of the economy; 3) the so-called “generic ballot” poll shows voters would prefer a Democrat to represent them in the House; 4) the war in Iran/the Middle East will be a continuing source of uncertainty and tension for the GOP; and 5) precedent strongly suggests the party that controls the White House will lose a substantial number of House seats.

TL;DR
- Republicans are likely to lose the House due to several factors including a narrow majority and President Trump's low job approval.
- A Democratic House majority could impeach Trump again and block his legislative agenda.
- Losing the Senate would be detrimental to Trump as it would halt the confirmation of his nominees.
- Democrats have a growing chance of winning Senate seats, with several Republican-held seats considered vulnerable.
- Republicans' main pickup opportunity in the Senate is in Michigan.
- The political landscape is subject to change before the November elections.