Poverty as defined by the data from the US Census Bureau in the article is listed here. To list a few, the 2016 federal poverty level for households of 1, 2, or 3 individuals earn less than or equal to $11,880, $16,020, and $20,160 respectively. For 2017 those numbers are $15,060, $20,290, and $25,250.

The Heritage foundation, using their own wonky standards, claimed that only 250,000 people in the US live in poverty.

Statistics provided by the US Census Bureau from 2016 show that over 18 million people were living at 50% or less of the federal poverty level. For a household of 1, 2, or 3 people that was less than or equal to $5940, $8,010, and $10,080 respectively in 2016.

To put this into perspective, paying anywhere from $250-$500 a month (unrealistically low numbers these days) for housing costs $3,000-$6,000 a year without considering things like electricity, gas, water, food, clothing, and transportation.

To imply that these 18 million people weren't actually living in poverty, but that instead only 250,000 of them were, is absurd.