WASHINGTON — President Trump has pledged to donate $1 million from his personal fortune to storm victims in Texas and Louisiana.

“He would like to join in the efforts that a lot of the people that we’ve seen across this country do,” Sarah Huckabee Sanders, the White House press secretary, said Thursday during her daily briefing at the White House.

Ms. Sanders said the president has not decided when or where he will send the donation.

“He actually asked that I check with the folks in this room, since you are very good at research and have been doing a lot of reporting into the groups and organizations that are best and most effective in helping and providing aid, and he’d love some suggestions from the folks here and I’d be happy to take those,” she told reporters.

Mr. Trump’s pledge is one of the largest financial commitments made by a sitting president to a charitable cause. Ms. Huckabee, pressed by reporters, said she wasn’t sure whether the donation would come from Mr. Trump’s foundation or his own bank account, saying only that it would come from the president’s “personal” funds.