London, meet the new boss, same as the old boss. Mayor Sadiq Khan wins historic third term

London Mayor Sadiq Khan has a lot of cleaning up to do.

Khan, who made history Saturday by becoming the city's first mayor elected to a third term, has pledged to make the River Thames swimmable.

It wasn't a top campaign issue but it's an audacious goal considering the waterway was declared biologically dead not long before his birth in the city in 1970 and flows as an open sewer of sorts when heavy rains overwhelm London's ancient plumbing system.

Taming the Thames would not be Khan’s first swim upstream. His narrative is built around overcoming the odds.

As he frequently points out, he is the son of a bus driver and a seamstress from Pakistan. He grew up in a three-bedroom public housing apartment with seven siblings in South London. He attended a rough school and went on to study law. He was a human rights lawyer before he was elected to Parliament in 2005 as a member of the center-left Labour Party, representing the area where he grew up.

In 2016, he became the first Muslim leader of a major Western capital city, overcoming an opponent whose mayoral campaign was “at least somewhat Islamophobic,” said Patrick Diamond, a public policy professor at Queen Mary University of London.

“It was seen as an affirmation of him in terms of his status as a leading Muslim politician, but also as an affirmation of London in terms of its diversity, its liberalism, its cosmopolitanism,” Diamond said. “That was significant in a country which doesn’t historically have a very strong track record for having diversity in its senior politicians.”

Khan has faced subtle and overt discrimination throughout his career due to his ethnicity and religion. Some of the sharpest barbs have come from former President Donald Trump, who has feuded