The landmark Tax Reform Act of 1986 would never have happened without Jack Kemp. The voluble supply-sider, who died yesterday at 73, helped make tax reform, and not just tax cuts, acceptable to Republicans. As early as 1977, then-congressman Kemp and Senator Bill Roth (R-DE) pushed a bill that would have reduced tax rates across-the-board. In 1983, Kemp bucked many in his party by making back-channel overtures to Democratic tax reformer Senator Bill Bradley (D-N.J.)—an effort recounted in Jeff Birnbaum’s and Alan Murray’s Showdown at Gucci Gulch. Bradley and Kemp shared a key political insight: If you can get rates low enough, you will ease the pressure to create, and protect, tax loopholes.