WASHINGTON -- US President Donald Trump again blasted his Democratic presidential rival Joe Biden for supporting the Korea-US free trade agreement (FTA) in its original form, arguing the initial pact only caused losses for the United States.

"Joe Biden supported NAFTA, China's entry into the world trade.

He supported the Korean deal. The Korean deal was so bad. It was so bad. This was a deal ... done by crooked Hillary Clinton. This was a deal that was going to produce 250,000 jobs," Trump told a group of supporters in Pennsylvania.

"And she was right, for South Korea (it) produced 250,000. For us, we got nothing. No, we got losses. We got nothing. It was a terrible deal. I renegotiated. Now it's a good deal," he added.

Trump has frequently singled out the Korea-US FTA as one of the major failures of the former Barack Obama administration, in which the now Democratic presidential hopeful served as vice president.

The pact was renegotiated in 2018 at the US' request and implemented at the start of last year.

Under the revised free trade pact, Seoul doubled to 50,000 the number of US vehicles entering its market each year without having to meet its industrial regulations.

The US, on the other hand, was given a 20-year extension until 2041 for its 25 percent import tariffs on South Korean pickup trucks.

Trump also talked about his relationship with North Korean leader Kim Jong-un, which has also become one of his selling points in the lead up to the Nov. 3 presidential election.

"Remember they always said 'Oh, this Trump. He's radical. He's too radical. He'll get us in wars.' I kept you out of wars," the US president said.

"What happened with North Korea? Look, I get along with Kim Jong-un. They said that's terrible he gets along. No, it's good I get along," he added.

Trump and Kim have held three meetings, including two bilateral summits in June 2018 and February 2019.

Their talks, however, have stalled since their latest summit in Vietnam ended without a deal. (Yonhap)