'Start Here': Democrats pressure Trump to take on gun control and rescuers free crew members from capsized cargo ship

It's Tuesday, Sept. 10, 2019. Let's start here.

1. Gun control push

Congress is back in session with Democratic leaders renewing calls for gun control after dozens were killed in multiple mass shootings over the recess.

In a joint news conference on Monday, House Speaker Nancy Pelosi and Senate Minority Leader Chuck Schumer urged President Donald Trump to support a bipartisan bill to strengthen background checks for all firearm purchases.

"We are not taking 'no' for an answer. We are not going away," Pelosi said. "What courage does it take to support legislation that will save lives?"

But Senate Majority Leader Mitch McConnell remains adamant about not bringing up gun legislation without the White House's blessing and the president has wavered on his position in the weeks since the shootings in El Paso, Texas, and Dayton, Ohio, ABC News' Katherine Faulders tells "Start Here."

"I think this week, now that Congress is back and negotiations are happening, will really be telling as to where this goes next," she says.

2. Cargo ship rescue

Four trapped crew members of a massive cargo ship have been rescued more than 30 hours after the boat caught fire and overturned off the coast of Georgia.

Rescuers located the men on Monday after hearing tapping noises from inside the 656-foot ship throughout the night, according to the U.S. Coast Guard.

Twenty crew members were pulled to safety the day before, but the four men had been unaccounted for as fires hindered rescue efforts.

The cause of the capsizing remains under investigation and it's unclear how long the ship, which is carrying thousands of vehicles, will stay in the water in the meantime, blocking a busy waterway, according to ABC News' Kaylee Hartung at the scene.

"I was speaking to a local businessman, a fisherman, and he's concerned this could take months, if not a year," she says. "You can't right this ship without extracting those vehicles from inside the ship."

3. Vaping warning

The Food and Drug Administration has issued a warning letter to Juul, accusing the company of illegally marketing its vaping products as a safer alternative to cigarettes without scientific evidence or receiving regulatory approval to support the claims.

"JUUL has ignored the law, and very concerningly, has made some of these statements in school to our nation's youth," said acting FDA Commissioner Ned Sharpless in a statement.

The warning comes as federal health officials investigate 450 cases of lung illnesses possibly linked to vaping, including at least five deaths, with many of the cases involving illegal or off-market THC products.

"The popularity of e-cigarettes and vaping really snuck up on government officials," ABC News' Stephanie Ebbs says. "They are really scrambling to understand what is causing these health problems in people and what really they should be doing about it."

Juul must respond to the FDA's warning within 15 days, the agency said. In a statement, the e-cigarette-maker said, "We are reviewing the letters and will fully cooperate."

"Start Here," ABC News' flagship podcast, offers a straightforward look at the day's top stories in 20 minutes. Listen for free every weekday on Apple Podcasts, Google Podcasts, iHeartRadio, Spotify, Stitcher, TuneIn or the ABC News app. Follow @StartHereABC on Twitter, Facebook and Instagram for exclusive content and show updates.