Baby circa 1945, Photo: George / Getty Images

"First came doctors’ warnings about cigarettes. Then came discoveries about the danger of secondhand smoke. Now, a growing number of scientists are raising the alarm about thirdhand smoke — residual chemicals left on indoor surfaces by tobacco smoke," the WashPost's William Wan reports.

Why it matters: "Public health advocates worry that those most vulnerable to the harmful effects of thirdhand smoke are also those who most likely to come into contact with it."

  • What it is: "[C]hemicals from tobacco smoke often linger on clothes, surfaces and even skin. ... Mounting research has shown such potentially hazardous residue can be absorbed through the skin, ingested and inhaled months and even years after the smoke has dissipated."
  • "A baby crawling on the ground ... has much more contact with carpets where cigarette residue often resides."
  • "And because of increasing socioeconomic disparities in smoking, low-income families are more likely to live in homes and neighborhoods where decades of smoking have led to thirdhand smoke accumulation."

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Democrats called on President Trump to disclose his tax returns following a New York Times report alleging he paid $750 in federal income taxes in 2016 and 2017 and nothing in 10 of the past 15 years.

Details: Trump said the report was "total fake news," that he's unable to release the returns as they're "under audit" by the IRS, "which does not treat me well." House Speaker Nancy Pelosi (D-Calif.) said in a statement the report "provides further evidence of the clear need" for a House lawsuit to access the tax returns and "ensure the presidential audit program is functioning effectively, without improper influence."

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Brad Parscale, the former campaign manager for President Trump's re-election campaign, at Drake University in January in Des Moines, Iowa. Photo: Tom Brenner/Getty Images

Fort Lauderdale police arrived at former Trump campaign manager Brad Parscale's home on Sunday after his wife called and said he was threatening to harm himself, Florida officials confirmed to Axios.

Details: Fort Lauderdale Police Sgt. DeAnna Greenlaw told Axios officers responded to a report of "an armed male attempting suicide" just before 4 p.m. local time.