Democrats reluctant to require lobbyists to disclose roles in campaign contributions

It appears Democrats in the U. S. House of Representatives are reluctant to make some of the reforms that are necessary in order to live up to their campaign promises.
An editorial in today's Washington Post indicates Democrats, backed by the infamous K Street lobbyists, are attempting to derail efforts to eliminate the practice of bundling, lobbyists collecting campaign contributions from all of their clients and delivering it to the politicians:

As it stands, lawmakers who happily take the cash and the lobbyists who harvest it for them are all too aware of how much the former are indebted to the latter. The public is left in the dark. If House leaders want to have credibility on cleaning up the "culture of corruption" they decry, they will see to it that the lobbying package that passes the House is as strong on this score as the Senate version.