The head-to-head was marked by an exchange of accusations over transparency, or the lack of it.

The head-to-head was marked by an exchange of accusations over transparency, or the lack of it.
The second round (segunda volta) is a runoff held if no candidate obtains more than 50% of votes in the first round; the top two candidates then compete head‑to‑head. For expats following elections, the second round is usually decisive because broader coalitions form and turnout and endorsements can change the outcome.