Voters in the US go to the polls on 5 November to elect their next president.

The election was initially a rematch of 2020 but it was upended in July when President Joe Biden ended his campaign and endorsed Vice-President Kamala Harris.

The big question now is - will America get its first woman president or a second Donald Trump term?

As election day approaches, we'll be keeping track of the polls and seeing what effect the campaign has on the race for the White House.

Who is leading national polls?

(CNN) Former President Donald Trump was unhappy with his impeachment lawyer Bruce Castor's opening argument on the Senate floor Tuesday, two people familiar with his reaction told CNN.

Castor, who is representing Trump alongside attorney David Schoen, delivered a meandering argument during the first day of the Senate impeachment trial, including praise for the House impeachment managers for a presentation that he said was "well done."

Trump was almost screaming as Castor struggled to get at the heart of his defense team's argument, which is supposed to be over the constitutionality of holding a trial for a president no longer in office. Given that the legal team was assembled a little over a week ago, it went as expected, one of the sources told CNN.

Still, Trump's allies were flabbergasted when the attorneys switched speaking slots at the last minute.

Castor's discursive presentation featured lengthy praise of the Senate, including…

President Trump has taken the extraordinary step of threatening to close down social media platforms.

The threat came after Twitter added fact-check links to his tweets for the first time.

The battle between the president and the social-media companies has been brewing for a time.

But now it feels as though an all-out war is looming between Donald Trump and Twitter ahead of the US presidential election, in November.

Last night, a couple of Trump tweets raging about "fraudulent" postal ballots in US elections featured - for some users but not all - a strapline linking to what Twitter called "facts about mail-in ballots."

The Trump administration on Friday moved to block shipments of semiconductors to Huawei Technologies from global chipmakers, in an action that could ramp up tensions with China.

The U.S. Commerce Department said it was amending an export rule to “strategically target Huawei’s acquisition of semiconductors that are the direct product of certain U.S. software and technology.”

The department added the “announcement cuts off Huawei’s efforts to undermine U.S. export controls.”

The rule change is a blow to Huawei, the world’s no. 2 smartphone maker, as well as to Taiwan’s TSMC, a major producer of chips for Huawei’s HiSilicon unit as well as mobile phone rivals Apple and Qualcomm.

Huawei, which needs semiconductors for its widely used smartphones and telecoms equipment, is at the heart of a battle for global technological dominance between the United States and China.