
Republican Sens. Mike Lee and Ted Cruz were among those who gathered Sunday morning, along with former Alaska Gov. Sarah Palin, according to WTOP Radio. Cruz said President Barack Obama is using veterans as pawns in the shutdown.
"Tear down these walls," the crowd chanted. Protesters also sang "God bless America" and other patriotic songs as they entered the memorial plaza.
"This is the people's memorial," Palin told the crowd. "Our veterans should be above politics."
The memorial has become a political symbol in the bitter fight between Democrats and Republicans over who is at fault since the shutdown began on Oct. 1. Earlier rallies have focused on allowing access for World War II veterans visiting from across the country with the Honor Flight Network.
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Later some protesters carried barricades to the White House and rallied outside the gates, confronting police in riot gear. Protesters carried one sign reading "Impeach Obama."
District of Columbia police said the crowd was starting to disperse by 1 p.m. U.S. Park Police said there had been at least one arrest at the Lincoln Memorial, though no details were available.