The U.S. delegation had planned to visit the Brazilian capital and cast doubt on the integrity of the voting system before a presidential election this fall, officials said.
Scant details have not quieted rumors and online speculation about the former Senate Republican leader’s condition.
The 3-2 loss to Arizona puts Washington three games back in Wild Card race.
After threatening a “massive attack,” the president said his envoys were talking with Tehran but left open the possibility of a sharp military escalation.
Hours before addressing the White House press corps, the president endorsed using subpoenas against reporters in national security leak investigations.
The popular governor lends her weight to centrist Haley Stevens in the race.
The president will address a smaller, heavily secured gathering Friday as his administration intensifies its legal and rhetorical attacks on journalists.
Tariffs are back.
Party officials also recommended New Hampshire, Nevada and Michigan as among the first states to vote for the nominee.
The country’s foreign minister said, however, that anyone wishing to partner with the West African nation “must respect” its sovereignty.