The Democratic candidate seemed to criticize President Obama's choice to replace the late Justice Antonin Scalia.
"I've selected a nominee who is widely recognized not only as one of America's sharpest legal minds but as someone who brings to his work a spirit of decency, modesty, integrity, evenhandedness and excellence," Obama said.
The Supreme Court is meant to adhere to the letter of the law, not to draw on life experiences.
Sandoval, a Mexican-American who is considered a moderate Republican, did not offer a reason for his withdrawal.
Service provides a brief respite for official Washington from the fierce battle over his succession.
How much do the top six names heading for Scalia's vacancy on the Supreme Court currently earn?
By violating the separation of powers, Senate Republicans are threatening democracy.
The Constitution allows the president to fill a vacancy on the Court temporarily, bypassing the Senate.
The conservative justice wrote the landmark decision in 2008 that recognized the Second Amendment as an individual right to bear arms.
Both parties wasted little time wading in to a heated clash that could continue until Obama leaves office.
Two prominent Asian-American judges among possible nominees after death of Antonin Scalia.
In June 1968, Chief Justice Earl Warren submitted his resignation to President Lyndon Johnson, who nominated Associate Justice Abe Fortas to replace him.
Justice Antonin Scalia's death puts all three branches of government in play.
Scalia's assertion that African-Americans don't do well at fast-track schools is just plain wrong.
The Supreme Court justice has all but said that black lives don't matter.
The ruling shows an activist court, for both the right and left.
The case the Supreme Court justice said was the perfect justification for capital punishment has fallen apart.