SAO PAULO/MEXICO CITY, Sept 26 (Reuters) - Brazil and Mexico's currencies firmed on Wednesday after the U.S. Federal Reserve raised interest rates and left intact plans to steadily tighten monetary policy, while strong polling by a market-friendly Brazilian presidential candidate helped lift the real.Brazil's real currency strengthened almost 1.3 percent after the poll by Brazil's Instituto Parana showed right-wing Jair Bolsonaro in the lead, with 31.2 percent of respondents planning to vote for him in the first round of the presidential election on Oct. 7. That compares with . . .
