President Donald Trump 's approval rating has been "underwater" for six months, a data expert has said.

Harry Enten, CNN 's chief data analyst, said the president has been "swimming with the fishes" for "the vast majority of his second presidency" because of poor polling.

Why It Matters

Trump's approval rating is a useful snapshot of the mood of the nation and allows pundits and politicians alike to gauge the extent to which his policies are supported by Americans. An improving approval rating might buoy the administration and encourage it to continue its current political direction while—conversely—a negative rating might make it change course.

What To Know

Speaking on CNN on Monday, Enten said: "I do see something of a pattern. Sometimes we lose the forest for the trees but I wa

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