Brazil M&A deals tougher to close amid economic and political turmoil

By Guillermo Parra-Bernal and Tatiana Bautzer SAO PAULO, April 13 (Reuters) - Brazil's harshest recession in decades and deepening political turmoil are preventing buyers and sellers from finalizing dozens of mergers and acquisitions amid wide disagreements over valuations, according to dealmakers. Mergers in Latin America's biggest economy got off to their worst start in more than a decade in the first quarter as buyers, wary of growing economic imbalances and fallout from a corruption