Washington, Nov 18 (TIWN) Democratic candidates for the 2020 presidential election have reacted to a warning by former US President Barack Obama against moving too far left in politics.

Mr Obama's rare intervention into the Democratic race was a talking point at campaign events on Saturday.

Some Democrats called for unity, while others defended their policy agenda.

Nearly 20 candidates remain in the running and there is much debate over the best approach to taking on President Trump next year.

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Speaking at a fundraising forum in Washington, the former president - considered a moderate - cautioned candidates against pursuing polices that were not "rooted in reality".