Investment guru Steve Forbes predicts to Newsmax TV that President Donald Trump just might be able to actually persuade Congress to eventually enact a flat tax throughout the land.

“The only way you're going to get a flat tax — and 40 countries and jurisdictions around the would in recent years have put it in and it's worked very well everywhere it's been tried — is if it's pushed by the president,” the chairman and editor-in-chief of Forbes Media told Sunday’s “The Income Generation Show.”

A flat tax (short for flat tax rate) is commonly defined as a tax system that applies the same tax rate to every taxpayer regardless of income bracket. Most flat tax systems or proposals do not tax income from dividends, distributions, capital gains and other investments, Investopedia notes.

“President Trump indicated a little over a year ago that when he gets this tax bill through, which has now happened, he's going to be open to a big radical change like a flat tax in the next two or three years,” said Forbes, author of "Reviving America: How Repealing Obamacare, Replacing the Tax Code and Reforming The Fed will Restore Hope and Prosperity."

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“Remember, Ronald Reagan had a big tax cut in 1981 that five years later they cleaned the code of a lot of tax shelters and the like, cut the top break from 50 percent down to 28 percent, passed the Senate 97-3, so I'm hoping that we're going to really do the big job in the next few years,” Forbes told host David Scranton.

“I think this president wants to make a mark on history, isn't shy about it, and so I think he'll be more open to it than Congress,” said Forbes, a Republican candidate in the 1996 and 2000 presidential primaries.

Forbes made his comments as Republicans in the U.S. Congress this week approved a broad package of tax cuts in what was the largest overhaul of the tax code in 30 years, handing Trump a major legislative victory. Trump is expected to soon sign the legislation, which has $1.5 trillion in tax cuts, Reuters explained.

Economists are forecasting a modest economic boost from the tax cuts, which includes slashing the corporate income tax rate to 21 percent from 35 percent. The fiscal stimulus will come while the economy is at full employment, which raises the risk of it overheating.

“What happened in the last few days before this bill was finally approved is the Senate side woke up to the importance of lowering those tax brackets. And so even though they have seven brackets instead of the four that the House originally had, those seven are better for individuals,” Forbes explained.

Forbes also noted that Trump was savvy enough to nearly always call the changes “tax cuts” instead of the more confusing “tax reform.”

Forbes explained that “’tax reform’ doesn't say anything to people. Call it ‘tax cuts.’ People understand cuts. But reform, what are you talking about?”

“I have nothing against tax lawyers, but I think the less work they have, the better off we are.”

Forbes also explained that a capital gains cut isn’t just a tax cut for the wealthy.

“Everyone has a 401(k), or some kind of retirement plan, and it would reduce the capital gains levy, that gives a real firm basis to an increase in increasing assets of your 401(k) or IRA or Roth IRA. It also gives people more incentive to invest, it creates new products, new services, and the jobs that have higher income,” he said.

“So you just don't keep more of what you're currently earning, but your pay starts to go up in a meaningful way. So you get a good double bang. You keep more of what you earn, but you're going to be earning more. So you have lower taxes on the higher earnings, that's better for everybody. And every time we reduce the capital gains tax levy, the economy benefits from it,” he said.

“There's been more investment and the government gets more money, so it's win-win. It's good for the economy, you have instant revenue for the government so you don't get caught up on, ‘We need to pay force for these tax cuts,’ which is crazy anyway. So it's good, it's good that we get away from this thing and get a real capital gains tax cut and not let the Democrats define the terms of debate,” he said.

Forbes also predicts that this tax-reform victory could very well lead to another term for Trump.

“If he decides to run for re-election just as an aside, the Democrats have to run somebody against him. And that makes this whole calculus very different,” he said.

“It’s one thing to say, ‘Well I really don't like that guy,’ but who are they putting up?”

Forbes said Trump can tout many solid achievements in his first year.

Forbes said Trump must convince wary voters so they will come to think "This guy rose to the occasion despite all the things we might not have liked about him."

Forbes thinks if Trump "picks his fights more carefully, I think he can start to cash in on what the economy is going to do, what the market has already done so people focus on the achievements and that will benefit him and set him up for 2020.​"

"The Income Generation" airs on Newsmax TV every Sunday at 10 am ET.