During his first primetime address to the nation to discuss the war with Iran, President Donald Trump on Wednesday sought to reassure — and convince — Americans that the operation is necessary and will soon wrap up, as gas prices rise and foreign leaders grapple with the war’s fallout.

Markets didn’t appear to buy into Trump’s optimism — at least, initially — with S&P futures dropping and Brent crude rising.

Roughly four weeks in, Trump portrayed the operations in Iran as necessary, reiterating his administration’s argument that Iran cannot be allowed to obtain a nuclear weapon and “had no intention of abandoning” that pursuit. The US president touted the operation’s success thus far, laying out US objectives and making an effort to ease voters’ concerns on rising gas prices — he said the increase will be “short-term” and blamed Iran for the rise in costs.

And, as a White House official noted earlier on Wednesday, Trump offered up a two-to-three-week timeline for the war’s completion, saying the core military objectives will be achieved “shortly” by the US.

“We’re going to finish it very fast,” Trump said. “We’re getting very close.”