Obstructionist

n.

1.

One who deliberately hinders progress; one who obstructs business, as in a legislative body.

Noun

1.

obstructionist - someone who systematically obstructs some action that others want to take Synonyms: obstructer, obstructor, resister, thwarter

bitter-ender, brawler, defendant, diehard, disputant, dissentient, dissident, filibuster, filibusterer, frustrater, hinderer, impeder, intransigent, irreconcilable, last-ditcher, litigant, marplot, naysayer, negativist, noncooperator, objector, obstructer, obstructive, opposer, oppositionist, plaintiff, protester, quarreler, resister, scrapper, thwarter, wrangler