President Donald Trump on Tuesday used the high power of his office to pardon "Butter," a 47 pound (21 kg) turkey, during a U.S. tradition at the White House where he also cracked jokes about Democrats' investigation into whether he should be impeached.

Both Butter and his alternate "Bread" escaped the fate of becoming the main course of a Thanksgiving feast and were sent to a special reserve in Virginia.

Standing at a podium in the Rose Garden, Trump said the birds had been raised to remain calm under "any condition."