Trump says he may have to give Tehran "the hammer," and Iran's supreme leader says a response to any threat would have no geographic limits.
Trump says Netanyahu raised the idea and Israel can still buy US arms, but it is unclear which funding he meant.
Trump had said the US would not strike before the midterms, and officials say the action is not a return to major combat.
A Pentagon spokesman rejects the report and calls the Iran operations a "decisive success," as Trump weighs renewed strikes.
Morocco's royal palace welcomed the end of the mission, while the Polisario Front called the decision unacceptable.
Qatari mediators held talks in Tehran on Friday to restart US-Iran negotiations, and Trump says the war will end soon.
Trump says the letter is about medical supplies, while a US official says it stresses that any talks must cover the nuclear issue.
The Houthis say a Saudi cargo plane was the target, and they blame Saudi-led airstrikes for 14 deaths at a northern market.
Police say they found no evidence for Likud's claims of widespread fraud. Final count: Netanyahu's bloc 53 seats, rival Gadi Eisenkot's 48, Arab-led parties 19.