Invisible, But Oh So Influential By Shira Toeplitz and CQ-Roll Call Posted April 29, 2010 at 12:00am Facebook Twitter Email Reddit John McArdle contributed to this report. Please send news of developments in the political industry to srt@rollcall.com Recent Stories Democratic divisions in Arizona special election don’t fall along conventional lines They wanted to ‘fix Congress.’ They still do, modernizers say Capitol Lens | Chrome Dome Republican primary to succeed Rep. Mark Green heats up in Tennessee Far from the people it will impact, a big, beautiful circus on Capitol Hill That championship Nats season