While accepting the Democratic presidential nomination on Thursday night, Biden said in Delaware that "united we can and will overcome this season of darkness in America."

"Every day, Kamala has been fighting for justice on behalf of the only client she's ever had: the people," said Douglas Emhoff.

Trump went live with his tweeting as Obama and Indian-origin Senator Kamala Harris delivered their speeches at the 2020 Democratic National Convention on Wednesday.

Harris opened her vice-presidential acceptance speech on Wednesday night at the virtual Democratic National Convention by remembering her late mother, Shyamala Gopalan Harris, lamenting the fact that she could not be there to see her daughter's achievement.

Biden, 77, who served as vice president of the US for eight years from January 2009 to January 2017, would deliver his acceptance speech on Thursday.

With the nomination, 55-year-old Harris, who has many firsts to a trailblazing career starting with an attorney from California, would break another glass ceiling in US politics.

Robert, who took blood thinners, had experienced brain bleeds that began after a recent fall, The New York Times quoted a close friend of the family's.

Harris, 55, who is the first black to be selected as a vice-presidential candidate of a major party, took a trip down the memory lane, mentioning her 'long walks' in Madras (now Chennai) with her grandfather who would tell her about the 'heroes' responsible for the birth of the world's largest democracy.

"Fifteen years ago, I was leading the efforts to approve the historic civil nuclear deal with India. I said that if the US and India became closer friends and partners, then the world will be a safer place," Biden, who was vice-president in the Obama administration, said while addressing the Indian-American community on India's Independence Day.

"On behalf of the government of the United States of America and the American people, I extend greetings and best wishes to the people of India on your Independence Day," Secretary of State Mike Pompeo said on the eve of India's Independence Day.

The resolution was introduced by Senator John Cornyn, Republican Senate Majority Whip, and Senator Mark Warner, ranking member of the Senate Select Committee on Intelligence.

The conspiracy theory about Harris started following a Newsweek Op-Ed by Dr John Eastman, who ran in the Republican primary to be California's attorney general in 2010. Trump did not give his opinion on it but acknowledged that he has heard about such claims circulating on social media that Harris is not eligible to be the president of the United States.

Biden, 77, made his maiden public appearance with his running mate Harris on Wednesday and said that both of them are ready to get to work in rebuilding America and a better future for its people.

The US state department, which issued the revised travel advisory, on Wednesday said that the exemptions have been given under the national interest category.

Hitting hard on the three and half years of the Trump administration during her first appearance after being picked as the vice presidential nominee of the Democratic party on Tuesday, Harris, 55, presented a long list of missteps taken by the current United States government.

By naming the 55-year-old lawyer and politician from California as his running mate, Biden made history by selecting the first Black woman to compete on a major party's presidential ticket. If elected she would be the first ever women to be the vice president of the US and the first ever Indian-American and African vice president of the country.

"We'll see how she works out. She did very, very poorly in the primaries as you know. She was expected to do well. She ended up at right around two per cent," Trump told reporters at a White House news conference.

Launching a scathing attack on Harris, the Trump campaign said the Americans will resoundingly reject the absymal failures of Biden and Harris. 'Joe Biden is no moderate, and with Harris as his 'political living will,' he is surrendering control of our nation to the radical mob with promises to raise taxes, cut police funding, kill energy jobs, open our borders, and appease socialist dictators,' Katrina Pierson, Trump 2020 campaign's senior advisor, said in a statement.

Trump returned to the briefing room minutes later, confirming a shooting near the White House and assured the reporters that things were under control.

'Do not travel to India due to COVID-19. Exercise increased caution in India due to crime and terrorism'