- nonprofits engaging in grassroots lobbying soon could be forced to reveal political strategies and financial backers under an amendment attached to one of the Senate’s two pending lobbying-reform bills. The amendment, sponsored by Sens. Joe Lieberman (D-Conn.) and Carl Levin (D-Mich.), would require grassroots lobbyists such as Lux to register with the clerk of the House and disclose their spending within 45 days after starting an initiative. Conservative nonprofit groups last month assembled a coalition called LobbySense to help bring down the Senate’s original grassroots lobbying-disclosure provision, authored by Sen. John McCain (R-Ariz.) but replaced with the Lieberman-Levin language...