Well, Leif "the Lucky" Erikson has the prior discovery claim.
"For nine days I was as one lost, without any hope of life. eyes never
beheld the sea so high, angery,and covered with foam. The wind not
only prevented our progress, but offered no opportunity to run
behind any headland for shelter; hence we were forced to keep out in
this bloody ocean, seething like a pot on a hot fire. Never did the sky
look moe terrible;for one whole day and night it blazed like a furnance,
and the lightening broke forth with such violence that each time
I wondered if it had carried off my spars and sails; the flashes came
with such fury and frightfulness that we all thought that the ships
would be blasted. All this time the water never ceased to fall from the sky;
I do not say it rained, for it was like another deluge. The men
were so worn out they longed for death to end their dreadful
suffering."
--- Christopher Columbus' journal, December 5, 1502.
Didn't kill enough Skraelings* to make it into the history books for a long time.
* The Vikings of olde called the natives that the found in Newfoundland "Skraelings."
And of course, the recent archaeological evidence shows that white europeans where in north america over 20,000 years ago. Even longer than the illegal aliens ancestors..therefore we white folk are the real native americans.
Best bet is to admit that Columbus gets credit for discovering America for the Europeans, Asians and Africans, and for discovering Europe, Asia and Africa for the Americans.
Makes him the discoverer of 4 continents and I don't think you can beat that.