A historian and populist firebrand who boasted about his brawls with soccer hooligans has narrowly won Poland’s presidential election, in a political upset that could torpedo the centrist government’s efforts to unspool the legacy of authoritarianism in the country.

Trump-backed conservative candidate Karol Nawrocki narrowly won Poland's presidential runoff election over liberal Warsaw Mayor Rafał Trzaskowski.

By Karol Badohal, Karin Strohecker and Gergely SzakacsWARSAW/LONDON (Reuters) -Poland's path to narrowing its fiscal deficit, maintaining its credit ratings and keeping investors on board looks more difficult following conservative nationalist Karol Nawrocki's presidential election triumph.

Here’s what to know about Poland’s presidential runoff, which sets up a showdown between the governing party and resurgent nationalists.

Karol Nawrocki, a conservative nationalist, narrowly won Poland’s presidency. He is the latest Trump-energized populist to perform strongly in a European poll.

Poland's path to narrowing its fiscal deficit, maintaining its credit ratings and keeping investors on board looks more difficult following conservative nationalist Karol Nawrocki's presidential election triumph.

Conservative Karol Nawrocki’s victory in Poland’s presidential runoff has set the country on a more nationalist course.

Karol Nawrocki’s victory in Poland’s presidential election on Sunday has shaken Europe. A historian by training with no previous