随着参议院控制权成为焦点，共和党为保卫脆弱席位而战，中期选举版图正朝着有利于民主党的方向转变。
The midterm map is shifting toward Democrats as Senate control comes into play and Republicans fight to defend vulnerable seats.
在特朗普总统轻松获胜的州，参议院席位现在被视为胜负难料，但共和党也有自己的目标清单。
Senate seats in states that President Trump won handily are now seen as tossups, but the GOP has its own list of targets.