Brazilian President Dilma Rousseff vowed Tuesday to serve out her full term, on the eve of a Senate vote on opening an impeachment trial that could mark her last day in office.

"I want to assure you that for me, the last day of my term is December 31, 2018," Rousseff told a women's forum in Brasilia. "I am going to fight (impeachment) with all my strength, using all means available."