WASHINGTON (Reuters) - The Obama administration does not plan any announcement on Tuesday on a nominee for the Supreme Court, the White House said. President Barack Obama has said he plans to soon present a nominee to fill the vacancy on the high court left by the Feb. 13 death of conservative Justice Antonin Scalia, despite a stated refusal by Republican leaders in the Senate to consider any nominee during Obama’s final term. Spokesman Josh Earnest was responding to a question at a regular White House briefing. 