Rep. Jeff Flake (R-Ariz.) on Tuesday filed yet another resolution aimed at triggering a House ethics probe of the PMA Group, the defense lobbying firm under criminal investigation for allegedly providing improper campaign contributions.Flake’s resolution, the fourth of its kind, is more narrowly focused than the previous three: It asks the ethics committee to examine the relationship between fiscal 2009 earmarks for PMA clients and campaign contributions from PMA CEO Paul Magliochetti and his relatives.House Democratic leaders are expected to bring up Flake’s resolution on Wednesday and move to table it. This has been the fate of each of Flake’s previous resolutions, although each one picked up a handful of Democratic votes in each round.