Nervous Republicans focus energy on protecting Senate “firewall"

Nervous Republicans focus energy on protecting Senate “firewall”-thehill: The GOP majority in the Senate is shaping up as a firewall for Republicans who are worried that President Trump might falter and lose the White House next year. Republicans see winning back the House majority as a tough climb in 2020, and head-to-head matchups between Trump and various Democratic presidential contenders show the president behind his potential challengers.