Power broker Nancy Pelosi: once and current US House speaker

Twelve years ago, Nancy Pelosi made history as the first woman elected speaker of the US House of Representatives.Keeping Donald Trump in check will be among her top challenges as she presides over the House through the 2020 elections, when her party aims to dethrone the Republican commander-in-chief.Following November's election that saw Democrats win back the House, she is again the nation's third most senior official and one of the great survivors in American politics.