U.S. President Donald Trump has denounced the impeachment probe into his conduct after the U.S. House of Representatives took a historic step. Lawmakers voted on Thursday to allow for public impeachment hearings in Congress and set the rules for how they will run the inquiry.

Skybridge Capital's Founder & Co-Managing Partner Anthony Scaramucci said that Trump is failing at his job on many fronts and should "resign." He was speaking to CGTN on the sidelines of Future Investment Initiative summit in Riyadh, Saudi Arabia.

Scaramucci helped get Trump elected and was then fired as the White House communications director. After ending his 11-day tenure in the White House in 2017, Scaramucci first expressed his support of Trump, but then changed his tune and started opposing the president earlier this year.

Talking about his changed stance, Scaramucci said that he was not trying to oust Trump on account of personal bitterness, adding that Trump should resign as "I don't see any way that he will be the Republican nominee."

"You can't say that it is bitterness. I just look at the last 24 months of data – the trade war was dissembling international trading system. It's not good for anybody, not good for China, not good for the U.S.," he stressed.

Based on his observation, Trump is failing at his job on many fronts, and "American First" strategy cannot be "American alone." He wants the 2020 presidential election to result in anyone but Trump.

"When you think about portfolio of a company, you are going to find somebody with the right skill set, they have plans and they can execute the company, and now we have three years of data, where the skill set and the potential cannot match the execution, so you need to change the CEO, in this case the president," Scaramucci explained.

Meanwhile, Scaramucci is optimistic about the China-U.S. relationship in the long run.

"In the long term, I am very optimistic about the China-U.S. relationship. We need each other. We need a strong bilateral relationship… We are connected in the society. No nation can produce every single thing that it needs at the lowest price. We don't need to go back to 1980s. We need to be in 2040s," Scaramucci remarked.

Scaramucci acknowledges that many people in the U.S. still know little about the complexity of the Chinese system. "You have to come together. I found that when people meet each other, it's hard to demonize them, so we need to do a lot more frankly," he advised.

In his point of view, tariff is not the best way to deal with trade dispute. "If there are trade imbalances or tariff discrepancies, there is a way to handle it more safely, and we try to come up with better solution," Scaramucci stated.

Moreover, Scaramucci highlighted the significance of Chinese economic growth, adding that he is impressed by the Belt and Road Initiative (BRI). Scaramucci said that BRI is a long-term vision for "connectedness," which will benefit both China and the world. "We can do it together – that's my point,” he said.