Even if the drama swirling around President Trump contributes to a stock market slump, investors should stick to their long-term plan.  (ericsphotography/iStockphoto)

There’s at least one certainty about the stock market.

It’ll go up and eventually come down.

Last week, we witnessed this truth about investing. The markets responded with trepidation after a series of scandals hit President Trump.

Trump shared highly classified information with Russian diplomats. He fired FBI Director James B. Comey. He may have tried to get Comey to end an investigation of former national security adviser Michael Flynn. And now a special counsel has been appointed to investigate possible Russian interference in the election.

Many experts think it wasn’t these controversies that pushed stocks down. It’s that the scandals may get in the way of tax cuts and other business-friendly legislative measures.

So here we are, regular investors just trying to grow our money enough to retire or send our kids to college. As the stock market climbed in recent months, people began to call it the “Trump bump.”

But all good things come to an end in the investing world. The question now is: Are we about to see a “Trump slump,” and, if so, is there anything you should be doing with your investments?

Here’s a roundup of advice from some certified financial planners.

Carolyn McClanahan, founder of Life Planning Partners in Jacksonville, Fla., says politics should not play any part in your investment decisions.

“People should have an appropriate asset allocation based on their goals, time frame, and financial and psychological ability to take risk,” she added. “Don’t pay attention to the noise that politics creates.”

Larry Stein, president of Disciplined Investment Management in Deerfield, Ill., says Trump was getting too much credit for the market rise anyway.

“The bump was driven largely by stronger-than-expected [corporate] earnings, much of it due to surprisingly strong results overseas,” he said. “Optimism around the election may have added an extra jolt to the positive environment, but that wasn’t the main driver.”

Stein says the uncertainty now building in the U.S. political environment may have a negative impact on stocks, which is why he says investors might want to add global stocks to their portfolio.

“Stocks are for long-term goals, and investors should try not to focus on short-term fluctuations,” said Michael Guillemette, assistant professor of personal financial planning at Texas Tech University, who echoed Stein’s advice on diversifying your holdings.

Robert Schmansky, president of Clear Financial Advisors in the Detroit area, said, “By the time we hear the latest news, it’s already too late to act. The best plans are long term, and recognize we will have rocky periods. If you have a lot in the market, consider adding investments that may not correlate with stocks, like precious metals and real estate. Probably the best thing you can do is replay 2008’s market in your mind and think about if you were better off worrying or sticking with your plan. Most investors did best by sticking it out and staying invested.”

A. Scott Ward of Johnson Sterling in Birmingham, Ala., still sees room for growth. “The core questions for long-term investors remain the same. To what extent, if any, does volatility change your financial goals? Do you have any reasons to doubt that U.S. companies can find ways to grow and thrive in the next 20 years, regardless of the political circumstances?”

Joseph Kelly of Valic Financial Advisors in the Philadelphia area says some caution is in order.

“History has proven that markets abhor uncertainty,” he said.

“The chaos that is happening in Washington certainly has stirred the pot and infused doubt among the investors of America. I never recommend ‘timing’ the market; however, these are unprecedented times. I think it would be prudent to take some profits and put some liquidity on the sidelines for a wait and see period … time to decrease your risk profile for a while.”

James Watkins, managing member of InvestSense in Atlanta, pointed out that many experts believe the markets have had a significant run up, and a drop may just be due. “We have advised our clients to consider reducing their equity exposure, especially in 401(k) and other tax-deferred accounts since there would be no tax implications in making such changes,” he said.

Barbara Roper, director of investor protection for the Consumer Federation of America, says it’s “generally a mistake to focus on short-term ups and downs in response to the politics of the day or anything else. Doing so risks making poor market-timing decisions based on an emotional reaction to the news.”

Perhaps the Trump drama will lead to a stock slump. But what goes down can also go back up.The important thing to remember is that you’re in it for the long haul.