Washington DC - House Speaker Nancy Pelosi said on Tuesday she intends to run for a seat in the US House of Representatives again in November.

"While we have made progress much more needs to be done to improve people’s lives. This election is crucial: nothing less is at stake than our Democracy," Pelosi said in a statement and a video released on Twitter.

"But we don’t agonize – we organize," Pelosi added. "I am running for re-election to Congress to deliver For The People and defend Democracy."

Pelosi (81) has represented her constituency in San Francisco for more than 30 years.

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As House speaker, she holds the third-highest elected office in the US behind the president and vice-president.

Pelosi has been an important ally of President Joe Biden, a fellow Democrat.

All seats in the House of Representatives and about a third of the seats in the US Senate will be up for re-election in November's midterm elections.

The Democrats hope to defend or expand their narrow majority in both chambers. However, polls currently give the Republicans a good chance of securing the majority.