File this story under the “Petty Politics” category. Via The Stakeholder, the Democratic Congressional Campaign Committee’s own blog, we find that Roll Call is reporting that Democratic financier and philanthropist George Soros, at right, has floated the idea of buying the Washington Nationals, recently having joined the ranks of one of the groups that submitted a bid for the team. Congressional Republicans, upon having heard the rumor, slyly implied that action could be taken against…