Trump becomes the first sitting president to attend a Super Bowl.
President Donald Trump's second administration continued its swift recasting of the federal government, prompting pushback from Democrats and legal challenges.
The president said Sunday that he will announce tariffs on all imported steel and aluminum on Monday but didn't say when they'll take effect.
Trump, meanwhile, is at Caesars Superdome in New Orleans on Sunday night to take in the Super Bowl. Trump picked the Kansas City Chiefs to beat the Philadelphia Eagles in an interview aired before the game on Fox.
Ishiba was asked about Japan's response if the president issued a tariff on its exports.
Ishiba declined to answer calling the question "hypothetical," which got laughs from the president.
Trump was asked again about Musk's access to government data and said he has instructed the billionaire to take a look at the budgets of a number of agencies including the Pentagon.
Trump claimed that there there was going to find some things "are going to be bad," without giving details.
Trump was asked about Elon Musk's Department of Government Efficiency access to the Treasury Department's vast federal payment system, which includes highly sensitive information like Social Security numbers and bank accounts for millions of Americans.
"Why does DOGE need all of that?" a reporter asked.
"It doesn't but they get it very easily," Trump replied. "And we don't have very good security in our country, and they get it very easily."
Trump went on to praise the work Musk and his team is doing to cut what the administration says is government waste.
"We're going to be doing more and more of that," he said. "We're going to be looking at Department of Education. We're going to be looking at even our military. We're going to be looking at tremendous amounts of money, being spent on things that bear no relationship to anything and have no value. We're talking about trillions of dollars."
Japanese Prime Minister Shigeru Ishiba said he "conveyed my willingness" to Trump to increase Japan's investment in the U.S. to an "unprecedented" $1 trillion.
Japan is already the largest source of foreign direct investment in the U.S.
