这位议员被视为阻挠者，因为他反对所有旨在改善医疗系统的法案。

The congressman was seen as an ___obstructionist for opposing every bill aimed at improving the healthcare system.

这位议员以阻挠议事著称，经常提出大量修正案来拖延法案通过。

The senator is known for his ___obstructionist behavior, often proposing numerous amendments to delay bills.