"Democracy Spring" activists arrested outside U.S. Capitol.
Civil disobedience campaign is aimed at curbing influence of money in politics.
More than 400 protesters staging a sit-in against the influence of money in politics and congressional inaction to reverse it were arrested on the steps of the U.S. Capitol Monday, the first day of what is expected to be a week-long series of demonstrations.
"More than 400 individuals have been arrested for unlawful demonstration activity, and are being processed using mass arrest procedures," the U.S. Capitol Police said in a statement early Monday evening. Those taken into custody will be charged with "crowding, obstructing and incommoding."