Britain's Prime Minister Boris Johnson leaves from a polling station with his dog Dilyn after casting his ballot in London Thursday. Photo: Daniel Leal-Olivas/AFP via Getty Images
Polls across the United Kingdom opened Thursday morning as millions of Brits vote in the country's third general election since 2015.
Why it matters: Prime Minister Boris Johnson has staked his leadership on a promise to "get Brexit done" by securing a majority in the election, after facing a parliamentary impasse on the issue in a minority government. But if he loses, he'll go down as one of the shortest-serving prime ministers in history.
Sen. Susan Collins (R-Maine) said in a statement Saturday she believes whoever is elected in the 2020 presidential race should pick the nominee to fill Justice Ruth Bader Ginsburg's Supreme Court seat.
Why it matters: Collins will be key in how the nomination process plays out. As one of the most centrist Senate Republicans, whether or not the Senate confirms Trump's SCOTUS nominee could hinge on her vote.