<Anchor> In the

United States, former President Obama, who served as a speaker at the Democratic Party's National Convention, criticized President Trump for breaking the practice of refraining from criticizing the incumbent president. President Trump continued to sprinkle ash at other parties until the last day of the Democratic National Convention.

This is Kim Yoon-soo, correspondent in Washington.

<Reporter> On the

third day of the Democratic National Convention, Former President Obama surrendered his final speech, which was his representative speaker, to vice presidential candidate Senator Harris.

Then, the former president attacked President Trump as if he was determined to break the US political practice of refraining from criticizing the incumbent.

He was criticized for treating the presidency as a reality show.

[Obama/Former US President: Trump couldn't hold the presidency. Because I didn't have the ability. And the consequences of the failure were disastrous.]

Senator Harris was officially nominated for the Democratic Party's vice presidential nomination, making him the first black female vice presidential candidate in the history of the US constitution.

Congressman Harris emphasized his career as an Asian and Black man, calling for a racist-free America.

[Harris/US Democratic Party Vice President Candidate: We need a president who unites us so that blacks, whites, Hispanics, Asians, and indigenous peoples can create a future that everyone wants.]

President Trump continued his're-spraying movement' day after day.

Today (21st), the last day of the Democratic Party, a cross-fire campaign was held in Scranton, Pennsylvania, home to former Vice President Biden.

President Trump also focused on subtracting Kim until the last day of the Democratic Party's subjugation, with former Vice President Biden's decision to appear on the air just before his acceptance speech.