Battle for last votes to seal fate

Two-thirds majority, or 342 deputies, will be needed to send the case to Senate for impeachment trial

Brazilian President Dilma Rousseff's fate rested on Tuesday on the loyalties of the about 100 or so congressional deputies yet to declare how they will vote in a looming impeachment showdown.

In a ruthless and complex contest, supporters and opponents of Brazil's first female president raced to amass the magic number that will make history when the lower house of Congress votes in a week's time.