washington head hard-line republican conservative faction u.s. congress want impeach nation top tax officer say lawmakers could without accuse crime internal revenue service commissioner john koskinen impeach within weeks say jim jordan chairman house representatives freedom caucus interview jordan demand come amid numerous republican attack irs recent months bash tax-collecting agency perennial capitol hill practice jordan handful conservatives push usual say jordan could impeach simply betray trust put u.s. public carry job correctly someone violate public trust way individual agency warrant ... impeachment jordan say impeachment formal charge wrongdoing trial would occur senate two-thirds vote necessary removal office republicans control 54 100 senate seat make vote unlikely ask house act ohio republican reply hope leave summer break irs say statement koskinen provide congress full cooperation truthful testimony remain focus serve u.s. taxpayers tuesday republicans detail complaints koskinen house judiciary committee hear never popular lawmakers irs anger republicans 2013-2014 controversy handle applications conservative political group tax-exempt status episode cause shake-up top irs personnel koskinen bring obama administration late 2013 restore order house since approve several bill attack irs budget sharply cut jordan say second hear june would determine standard impeachment ground impeachment list constitution treason bribery high crimes misdemeanors koskinen decline invitation testify tuesday accuse fail comply congressional subpoena mislead investigators republicans say inaction result destruction thousands key email impeachment use two presidents cabinet secretary senator 15 federal judge accord congressional research service lead house conservative want irs chief impeach