Sean Feucht, Eric Metaxas, and Russell Johnson among event organizers
Lego outreach, wildfire relief, fighting food insecurity, and tuition assistance
The religious humanitarian group had its accounts closed suddenly last year.
Resignations come as ministry is set to host huge annual conference
Ukraine, Israel to receive funds
The probe began after someone sent letter to IRS about "potential electioneering violations"
LaHaye, wife of pastor and author Tim LaHaye, led Concerned Women for America for almost 30 years
Driscoll said conference had "spirit of Jezebel"