"President Trump's assertion of support to the Arab Coalition in Yemen is a positive signal," Gargash said on Twitter early on Wednesday.
The decision is both "timely and strategic" Gargash added.
The White House said on Tuesday that Trump had vetoed the congressional resolution.
"This resolution is an unnecessary, dangerous attempt to weaken my constitutional authorities, endangering the lives of American citizens and brave service members, both today and in the future," Trump said in the veto message.