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

obstructionist 是由名词 obstruction（阻碍、障碍）加上后缀 -ist 构成的名词，表示"故意阻碍或拖延事务进行的人"。后缀 -ist 通常表示"从事某种行为或持有某种立场的人"。 在政治语境中，obstructionist 特指那些故意阻挠立法进程或政策实施的政客。