Good morning from the WSJ Washington Bureau. 

Trump Administration: The president delivers an address at the United Nations General Assembly, and is expected to call on world leaders to unite against threats posed by Iran and other dangers around the globe.

Congress: Democratic leaders will have an all-caucus meeting to discuss the allegations against the president over his interaction with Ukraine. More below.

NEW: The administration completed new overtime rules. An additional 1.3 million workers will qualify for overtime pay as the Labor Department raises the earnings threshold to $35,568.

President Trump placed a hold on nearly $400 million in military aid to Ukraine before a July phone call in which he urged his Ukrainian counterpart to investigate Joe Biden’s son. The revelation comes as an investigation into the president’s dealings with Kiev are mushrooming on Capitol Hill, Rebecca Ballhaus, Andrew Restuccia and Siobhan Hughes report.

• Seven House Democrats, who say they're veterans of the military and defense and intelligence agencies, called for an impeachment inquiry into Mr. Trump over his dealings with Ukraine.
• Senate Minority Leader Chuck Schumer called on Majority Leader Mitch McConnell to launch a broad investigation.

The leaders of Britain, France and Germany joined the U.S. in blaming Iran for this month’s attacks on Saudi Arabia and said the time had come for Tehran to start talks on a new, long-term agreement dealing with its nuclear, regional and missile activities, Laurence Norman and Michael R. Gordon report.

Iran needs for the U.S. to be seen as the aggressor. So far, that strategy hasn't worked. But the stakes in this international poker game are growing higher, and the costs of losing the bet are rising. Under U.S. pressure, Tehran could give in—or strike back with force, writes Jerry Seib.

President Trump ran as the ultimate dealmaker. But his unfinished business is starting to stack up. Still on Mr. Trump’s to-do list: a trade deal with China, a nuclear pact with Iran, legislative passage for a trade agreement with Canada and Mexico and gun policies to combat mass shootings, Catherine Lucey reports.

Support from labor groups will be a deciding factor in whether a trade deal with Mexico and Canada sees a vote in the House, reports Natalie Andrews. While labor groups say the deal is an improvement over Nafta, the new deal has been criticized for not having stronger provisions to prevent U.S. companies from moving across the border.

President Trump’s litany of recent attacks on Joe Biden has created an opportunity for the former vice president to argue that he is best equipped to beat Mr. Trump.

Mr. Trump has come under fire over reports last week that he repeatedly asked the president of Ukraine to investigate Mr. Biden and his son, who had business dealings in Ukraine while Mr. Biden was vice president.

Mr. Trump has denied threatening to withhold military aid for Ukraine if Kiev didn’t pursue an investigation of Mr. Biden, but the president has doubled down on his public criticism of the former vice president, arguing, without evidence, that Mr. Biden was involved in a scheme in Ukraine to protect his son.

Reports of Mr. Trump’s interactions with Ukraine have drawn widespread condemnation from Democrats, who are calling on the administration to give Congress access to a whistleblower complaint that is partly related to the Ukraine call. Some Republicans are also looking for more information about Mr. Trump’s call with Ukranian President Volodymyr Zelensky and the whistleblower complaint.

The swelling controversy has put Mr. Biden in a direct confrontation with Mr. Trump, and Mr. Biden has quickly used the issue to bolster his claim that he will beat Mr. Trump.

“Donald Trump asked a foreign leader to investigate me and my family. Why? Because he knows I'll beat him like a drum,” Mr. Biden wrote on Twitter.

Sustained attacks on Mr. Biden’s integrity from Mr. Trump carries political risks for the former vice president, as other Trump opponents have discovered. But in a primary campaign that prizes directly taking on Mr. Trump and his administration, becoming the top antagonist to the president could also carry political benefits for Mr. Biden.

Write to Andrew Duehren at andrew.duehren@wsj.com

Political campaigns are seeking help from the kingpins of the internet: YouTube celebrities, Twitter personalities and Instagram-famous dogs, report Emily Glazer and Georgia Wells. They're borrowing a tactic used by brands, hoping influencer support is the new celebrity endorsement.

• Influencers must disclose when a brand has sponsored a post, but the FEC has made no such rules for political content.

The Democratic National Committee is boosting its requirements to qualify for a debate in November. The committee said that candidates would need to reach at least 3% support in four polls and attract at least 165,000 donors to qualify, up from 2% support and 130,000 donors needed to qualify for the October debate, Ken Thomas reports.

National Republicans are working to head off conservative insurgents who they fear could cost the party its Senate majority, reports Andrew Duehren. Several of the insurgents portray themselves as heirs to President Trump’s outsider approach to politics. 

A federal appeals court overturned FCC changes in media ownership rules, drawing a harshly worded response from FCC Chairman Ajit Pai. The court said the agency should have looked more closely at potential impacts on minority ownership. Mr. Pai suggested the appeals court judges have become obstructionist, reports John D. McKinnon.

Nissan and its former chairman, Carlos Ghosn, have settled civil charges with the SEC. Nissan agreed to pay a $15 million civil penalty to settle charges that it and Mr. Ghosn filed false financial disclosures. Mr. Ghosn agreed to a $1 million civil penalty, Nick Kostov reports.

• The publisher of the New York Times writes that the Trump administration knew one of the newspaper's reporters was going to be arrested in Egypt, but intended to sit on the information and do nothing to prevent the arrest. (New York Times)
• Climate activist Greta Thunberg is unsettling to adults precisely because she is a teenager, and looks and acts like one. (The Atlantic)

This newsletter is a production of the WSJ Washington bureau. Our newsletter editors are Tim Hanrahan, Kate Milani, Troy McCullough and Daniel Nasaw. Send feedback to capitaljournal@wsj.com. You can follow politics coverage on our Politics page and at @wsjpolitics on Twitter.