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2020 Dems take shots at Trump, clash over policy proposals during Round 1

The first primary debate of the 2020 presidential election season saw cracks of daylight emerge in a Democratic field that has largely played to the progressive base, with the candidates clashing sharply over controversial policies like "Medicare-for-all" and calls to decriminalize illegal border crossings -- while taking ample shots at President Trump in the process. Staking out the left flank of the party Wednesday night in Miami were Sen. Elizabeth Warren, D-Mass. -- the highest-polling candidate in the first debate batch -- and long-shot Bill de Blasio, the New York City mayor. They were the only candidates to raise their hands when asked who's willing to give up their private health insurance for a government option. Warren went on to staunchly defend 2020 rival Sen. Bernie Sanders’ "Medicare-for-all" plan.

Beto O'Rourke, the one-time media darling in the crowded Democratic field who has watched his poll numbers wilt in recent months, looked to regain much of his lost momentum on Wednesday night. While he was among a handful of candidates who gave some responses in Spanish, he repeatedly found himself on the receiving end of swipes from rivals, especially former Housing Secretary Julian Castro.

Among the candidates looking for breakout moments, Castro may have come the closest with his controversial call for the decriminalization of illegal border crossings, challenging his fellow presidential hopefuls to agree to repeal the section of the Immigration and Nationality Act that applies. He called out O'Rourke by name for not supporting his proposal, saying, “I think you should do your homework on this issue. If you did your homework on this issue you would know that we should repeal this section.” Discussing the heartbreaking photo that emerged this week of a migrant father and toddler daughter who drowned trying to cross the Rio Grande, Castro said it "should piss us all off."

President Trump, who was on his way to Osaka, Japan, for the G-20 Summit, watched at least the first half-hour of Wednesday's debate, tweeting a one-word verdict of the event: "BORING!" He later swiped at NBC News and MSNBC for technical difficulties that marred part of the telecast.

Despite their differences on major issues, the candidates – especially Warren -- rallied to downplay economic successes and growth under the Trump administration. "It's doing great for a thinner and thinner slice at the top," Warren said of the economy. The Trump campaign and Republican National Committee rapid response team, though, sent email blasts and tweets "fact-checking" and defending the president's economic record and the creation of "6 million jobs" since Election Day 2016.

Biden, Sanders to share the stage, more fireworks expected in Round 2

The second round of the first Democratic primary debate will take place in Miami on Thursday and will feature the current frontrunner, former Vice President Joe Biden, and U.S. Sen. Bernie Sanders, I-Vt., on the same stage. The debate will also include these eight candidates: U.S. Sen. Michael Bennet of Colorado; South Bend, Ind., Mayor Pete Buttigieg; U.S. Sens. Kirsten Gillibrand of New York and Kamala Harris of California; Colo. Gov. John Hickenlooper; U.S. Rep. Eric Swalwell of California; author Marianne Williamson; and businessman Andrew Yang

TUNE IN: Don't miss Fox News' post-debate coverage on "Fox News @ Night" at 11 p.m. ET with Shannon Bream, Bret Baier and Ed Henry.

Ahead of G-20 Summit, Trump vows more tariffs on China if no deal is reached

Before leaving for the G-20 Summit, President Trump, in an exclusive interview with Fox Business' Maria Bartiromo on Wednesday, vowed to impose additional tariffs on China if a trade deal is not reached. “When tariffs go on in China, we are taking in billions and billions of dollars," Trump said. "We never took in 10 cents — now you have another $325 billion that I haven’t taxed yet. It’s ripe for taxing — for putting tariffs on." Trump is expected to meet with Chinese President Xi Jinping on Saturday to discuss trade between the world’s two largest economies. The result could have broad implications for the markets and the global economy.

Although it’s “possible” to reach a good deal, Trump said his “plan B” may include a 10 percent tariff on the remaining "$600 billion" worth of Chinese goods. Besides Xi, Trump's agenda in Osaka includes sit-downs with Russian President Vladimir Putin, Turkey's Recep Teyyip Erdogan, Saudi Crown Prince Mohammed bin Salman, Germany's Angela Merkel and Japanese Prime Minister Shinzo Abe.

Woman recalls falling ill in Dominican Republic, says doctor flagged possible poisoning

A Canadian woman who stayed at a Bahia Principe resort in the Dominican Republic in 2016 alleges that she fell critically ill after being exposed to a strong chemical odor in her room, and that she has battled multiple health problems ever since. Tina Hammell told CNN that the smell in her room at the Grand Bahia Principe Punta Cana resort woke her and her husband from a nap. Hammell is one of several people who have come forward to tell reporters about having fallen ill -- sometimes requiring hospitalization -- while at a resort in the Dominican Republic. After she and her husband returned home to Ontario, doctors told her that she may have been poisoned by something in the Dominican Republic.

Possible new clue is search for missing Utah college student

Salt Lake City police reportedly served a search warrant Wednesday at a home connected to the disappearance of a missing Utah college student, reports said. Mackenzie Lueck, 23, was last seen June 17 near a Salt Lake City park after she was dropped off by a Lyft driver. The University of Utah student was returning from her grandmother's funeral in California. Assistant Chief Tim Doubt said there is a “nexus” between the home and Lueck’s disappearance, but he did not say if anyone has been arrested, the Salt Lake Tribune reported. The Lyft driver, who was cleared as a suspect, told police he dropped off Lueck around 3 a.m. at Hatch Park, where another car was waiting for her.

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SOME PARTING WORDS

Bret Baier and Shannon Bream break down the memorable moments from Round 1 of first Democratic primary debate of the 2020 election season on Wednesday.

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Fox News First is compiled by Fox News' Bryan Robinson. Thank you for joining us! Enjoy your day! We'll see you in your inbox first thing Friday morning.