“The top Senate Republican political action committee is warning donors that the party faces a high risk of losing a U.S. Senate seat in Iowa, previously a GOP stronghold,” Bloomberg reports.“It’s the latest sign of the headwinds the party is facing going into the November midterm elections.”“The Senate Leadership Fund, allied with GOP leaders, sounded the alarm in a new confidential memo to donors seeking an additional $7 million to spend in Iowa ‘to double down and capture voters’ attention.'”