Chicago’s legal community is in the midst of its biggest fundraiser of the year.The Chicago Bar Foundation’s 11th annual Investing in Justice Campaign, where “140 percent” of the donations benefit more than 30 pro bono and legal aid organizations in the area, is taking donations throughout March.This year, the effort — known to include March Madness donating competitions and a firmwide indoor mini golf competition — is led by Jesse H. Ruiz, a partner at Drinker Biddle & Reath LLP …