The number of new Democratic members who have forsworn accepting corporate PAC contributions — which would climb to 41 if T.J. Cox is confirmed to have beaten Rep. David Valadao (R-Calif.), according to End Citizens United PAC — has made some corporations nervous. Lobbyists have tried to reassure their clients that not all the newly elected Democrats consider themselves part of the progressive wing of the party. “When you look at those new members, there are a lot of moderate members, too,” said David Castagnetti, a partner at the lobbying firm Mehlman Castagnetti Rosen & Thomas. “They’re not all hostile toward business.”