SAO PAULO (AP) — More than a decade of Workers Party rule has seen Brazil prioritize ties with its leftist regional neighbors, from helping muscle socialist Venezuela into the Mercosur trade bloc to financing a billion-dollar transformation of an industrial port in Cuba. Silva was thrust into the Socialist Party's presidential nomination when its candidate of choice, Eduardo Campos, died in a plane crash last month. [...] her anti-establishment profile has propelled her to a neck-and-neck race with Rousseff. Rousseff beamed in January as she stood beside Cuban President Raul Castro at a ribbon-cutting ceremony to open the first phase of an overhaul of the Port of Mariel, which the Communist nation expects will become the largest industrial port in the Caribbean. Critics blame the stagnation on Rousseff's heavy state hand on the economy, replete with trade barriers and an unfriendly business environment. In a column headlined "Marina scares the neighbors," Clovis Rossi, a foreign affairs columnist for the Folha de S.