Americans on Tuesday cast the final ballots in U.S. midterm elections that will determine whether Democrats lose control of Congress, and with it the ability to push forward on President Joe Biden's agenda in the next two years.

President Joe Biden made a final appeal on the eve of Tuesday's midterms for Democrats to protect democracy by defeating Donald Trump's Republicans in an election that polls show could upend power in Washington.

Elon Musk, Twitter's new owner, urged Americans to elect a Republican Congress in US midterms on Tuesday to counterbalance President Joe Biden's Democrats, the first time a major social media CEO explicitly took a side.

Joe Biden and Donald Trump headlined a frantic last day of campaigning yesterday on the eve of a midterm election that will shape the rest of the US president’s term -- and could pave the way for a White House comeback by his predecessor.

An election year that unfolded against the backdrop of economic turmoil, the elimination of federal abortion rights and broad concerns about the future of democracy is concluding with a final full day of campaigning in which leaders of both parties will issue urgent appeals to their supporters.

President Joe Biden, Democratic superstar Barack Obama and Republican firebrand Donald Trump all converged Saturday on Pennsylvania to push their parties to the finishing line in a race Biden said marks a “defining” moment for US democracy.

At least 10 people have been shot in the area of Kensington and Allegheny in Philadelphia on Saturday night, a CBS affiliate news channel reported.

The biggest names in Democratic and Republican politics -- Joe Biden, Barack Obama and Donald Trump -- headed to Pennsylvania yesterday hoping to tip the balance in a closely contested midterm race that could determine control of the US Senate. 

Twitter sacked half of its 7,500-strong staff on Friday as new owner Elon Musk launched his major overhaul of the troubled company just a week after his blockbuster takeover.

Just a month before the Group of Seven rich countries plan to cap the price of Russian oil, officials are racing to finalise details, leaving traders, shippers and insurers with questions about the price level and how it will work.

At least 14 people, including two children and a teenager, were shot in a drive-by shooting in western Chicago on Halloween night on Monday, but there were no immediate reports of fatalities, police said.

US Secretary of State Antony Blinken and Chinese Foreign Minister Wang Yi discussed rivalry between two superpowers and Russia’s war in Ukraine in a call Sunday, State Department and Beijing’s foreign ministry said.

President Joe Biden cast his ballot in the US midterms Saturday, participating in early voting ahead of elections that could cost his Democrats their Congressional majority.

US President Joe Biden will attend next month’s COP27 United Nations climate summit in Egypt, the White House said Friday, vowing he would “highlight the need for the world to act.”

Vice President Kamala Harris will represent the United States next month in Bangkok in the third in a trio of Asian summits, the White House confirmed Friday, as President Joe Biden returns for his granddaughter’s wedding.

Former US president Donald Trump on Friday hailed Brazil’s President Jair Bolsonaro as a “great” leader and called on Brazilians to vote him in for another term.

A man who clubbed US House Speaker Nancy Pelosi’s husband over the head with a hammer, shouting, “Where is Nancy?”, faced charges of attempted murder and other felonies a day after the violent break-in at the couple’s San Francisco home.

Former US president Barack Obama said Friday that democracy is at stake in next month’s midterm elections in the United States, as he hit his first stop on the campaign trail.

Elon Musk yesterday began his first full day leading Twitter, with critics and fans anxious to see how the planet’s richest man will run one of the world’s leading social media platforms.

Russia’s invasion of Ukraine highlights the “acute threat” posed by Moscow, but China is the most consequential challenge for the United States, the Pentagon has said.