After insulting the UN committee insinuating they were irrelavant, Bush no sooner had approval from Congress to use "force/war" if Hussein did not permit unfettered access for inspections - and the war ships were moved into place on the Gulf.
The Congress approved Bush using force or war because Bush did something for them earlier. 
( z1 approve :ARG0 ( z2 government-organization :name ( z3 name :op "Congress" ) ) :ARG1 ( z4 use :ARG0 ( z5 person :name ( z6 name :op "Bush" ) ) :ARG1 ( z7 or :op ( z8 force ) :op ( z9 war ) ) ) :ARG1-of ( z10 cause :ARG0 ( z11 do :ARG0 z5 :ARG1 ( z12 something ) :ARG2 z2 :time ( z13 before ) ) ) )