WASHINGTON — U.S. President Donald Trump plans to meet executives from the biggest U.S. defense contractors on Friday, the White House said, as the Pentagon works to replenish supplies drawn down by U.S. strikes on Iranand other recent military operations. The meeting underscores the Trump administration's drive to shore up weapons stocks after the Iran operation drew on munitions. Companies including Lockheed Martin and Raytheon parent RTX, along with key suppliers, have been invited to attend the meeting, sources familiar with the plan said, who spoke on the condition of anonymity because the plan is private. Pentagon negotiators have not been able to reach terms with large defense contractors as quickly as they would like, a U.S. official told Reuters earlier this week. Lockheed did not respond to a request for comment. RTX declined to comment on the meeting. The administration has been steadily ratcheting up pressure on defense contractors to prioritize production over shareholder payouts. Trump signed an executive order in January to identify contractors deemed to be underperformin