des moines iowa liberal group ally white house stag rally around country monday pressure republican senators include judiciary committee chairman block president barack obama supreme court nominee merrick garland time conservative group judicial crisis network say launch million three-week television radio digital advertise campaign colorado indiana iowa new hampshire north dakota west virginia oppose garland confirmation group back stance senate republicans include majority leader mitch mcconnell hold confirmation hear vote garland nomination iowa capital demonstrators target judiciary committee chairman chuck grassley whose panel handle confirmation hear supreme court nominees 50 protesters gather sidewalk outside federal build grassley office chant job plane pull banner carry message fly overhead liberal group include moveon.org organize rally target republicans home state senate two-week spring recess state include ohio pennsylvania texas wisconsin rally generally draw crowd dozens organizers say call grassley office every week last two three weeks seem like get message need find another way say des moines demonstrator tracey aubrecht 44-year-old homemaker north liberty iowa state senator rob hogg one four democrats run primary chance challenge grassley nov. election attend rally nomination require confirmation republican-led senate republicans say want next president make selection hop party win presidential election garland centrist appellate judge former prosecutor pick last week replace justice antonin scalia die feb. 13. appointment could tip court leftward first time decades white house say vice president joe biden deliver remark garland nomination georgetown law school thursday say garland also continue meet senators individually speak democrats charles schumer new york bob casey pennsylvania tuesday amy klobuchar minnesota wednesday side promise intensive campaign grind airwaves eclipse battle supreme court nominees recent decades garland remain relatively unknown among americans roughly one every five people say somewhat familiar reuters/ipsos poll conduct thursday monday find among hear garland half express favorable opinion include 60 percent democrats 43 percent republicans liberal group stage rally back obama 's supreme court pick