The phrase "a potent message that" is correct and usable in written English.
You can use it when describing a message that is powerful or impactful, often in the context of communication or persuasion.
Example: "The speaker delivered a potent message that resonated with the audience, urging them to take action."
Alternatives: "a powerful message that" or "an impactful message that".
It was a potent message that attracted fans, as varied as housewives and President Coolidge, who once met with him in the White House.
But the sheer number of protesters offers a potent message that any rush to war may have political consequences for nations that support Mr. Bush's march into the Tigris and Euphrates valleys.
Two African Americans going head-to-head for the biggest prize in the sport sent a potent message that the glass ceiling had finally been shattered.
An Immigration Department spokesman said that footage of the 54 being expelled "will be a very potent message that demonstrates the futility of engaging with the people smugglers... risking your life at sea, only to be put on a plane to be flown back to Malaysia".
It will be a very potent message that demonstrates the futility of engaging with the people smugglers...risking your life at sea, only to be put on a plane to be flown back to Malaysia".
During the campaign, she conveyed the simple but potent message that the time had come for democracy.
"When you turn down a guy like McMaster," he told me, "that sends a potent message to everybody down the chain.
"It's on Us" sends a potent message to college students and asks that they take its four-point pledge.
More than a million women and their supporters thronged enormous protest rallies Saturday in Washington and cities around the world, sending a potent message of defiance to President Trump that promised stiff resistance to any curtailment of rights for women and minorities.
Lamb opposed the tax cut, but Republicans discovered that alone was not a potent message.
If not, they nevertheless send a potent message: terrorists hope to to give the impression that they can strike at will, everywhere, anywhere.
