Updated at 5:35 p.m. ET

The House of Representatives failed to override President Trump's veto on a congressional resolution blocking his national emergency declaration. That executive proclamation paved the way for the administration to spend billions of dollars to construct a barrier along the Southwest border between the U.S. and Mexico after Congress refused to approve the full amount the White House demanded last year.

With Jane Clayson

Postpartum depression can be life-threatening. We look at a new drug just approved by the FDA and other efforts to help new mothers in distress.

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Bump stocks — the gun add-ons that can dramatically increase their rate of fire — are now officially illegal in the U.S., after a Trump administration ban took effect Tuesday. Anyone selling or owning bump stocks could face up to 10 years in federal prison and a fine of $250,000 for each violation.

Chief Justice John Roberts declined to hear an appeal from gun makers on the new ban Tuesday, allowing it to remain in place. A separate appeal that seeks a stay on enforcing the ban is before Justice Sonia Sotomayor.

Republican leaders in Texas are pushing for a bill in the state legislature that could add $9 billion into public education spending. But the push for education reform is nothing new in Texas. Fifty years ago, a San Antonio father named Demetrio Rodriguez demanded fair education for his children, taking his fight all the way to the Supreme Court.

Updated at 1:40 p.m. ET

The assertion by Attorney General William Barr that special counsel Robert Mueller found the Trump campaign did not conspire with the Russian government in 2016 removes, for now, a major focus of Democrats' messaging.

But it has also given them an opening to turn to an issue they believe is more important to many voters anyway: health care.

As many as one-third of Dallas adults are barely literate. Each year, literacy groups only reach 1.5 percent of them. 

Updated at 3:48 p.m. ET

Updated at 1:30 p.m. ET

In a significant shift, the Trump administration says the entirety of the Affordable Care Act should be struck down in the courts. Previously, the administration had pushed to remove the law's protections for people with pre-existing conditions but had not argued in court that the whole law should be struck down.