President Donald Trump arrives at Morristown municipal airport for a weekend at the Trump National Golf Club in Bedminster, New Jersey, August 2, 2019.

Attorneys for President Donald Trump returned to the Supreme Court on Friday to ask the justices for the second day in a row to block a demand for his income tax returns — this one from House Democrats.

On Thursday, Trump's lawyers asked the Supreme Court to hear their appeal of a lower-court ruling that would allow the Manhattan District Attorney's Office to obtain eight years' worth of Trump's personal and corporate tax returns from his accountants as part of its criminal investigation.

In their emergency application filed on Friday, Trump's lawyers asked the justices to temporarily halt another subpoena for his tax returns to issued to his accountants at Mazars USA by the House Oversight Committee. The firm has said it will hand over the records if it is required to.

"For the first time in our nation's history, Congress has subpoenaed the personal records of a sitting President from before he was in office," the president's attorney Jay Sekulow said in a statement. "And, for the first time in our nation's history, a court upheld a congressional subpoena to the President for his personal papers."

"Those decisions are wrong and should be reversed," he said.

It take five justices to vote to grant a stay.

The nine-member high court has five Republican appointees. Two of them, Justice Brett Kavanaugh and Neil Gorsuch, were appointed by Trump.

The Supreme Court is expected to decide whether to grant the stay before Wednesday, when the subpoena would otherwise be enforced.

William Consovoy, another one of the president's private attorneys, warned in the application that letting the lower court's opinion stand would burden presidents with an onslaught of congressional demands.

"Given the temptation to dig up dirt on political rivals, intrusive subpoenas into the personal lives of Presidents will become our new normal in times of divided government — no matter which party is in power," he wrote.

Trump's moves in both cases, which could result in landmark Supreme Court decisions, come as the president faces what is only the fourth presidential impeachment inquiry in American history, and as he seeks reelection next year.

The House is investigating Trump for pressuring Ukraine to investigate former Vice President Joe Biden, the front-runner for the Democratic presidential nomination.

If the Supreme Court takes one or both of the cases, it would decide them by the end of the court's term in June — less than five months before voters head to the polls to elect the next president..

Trump has vigorously fought to keep his tax returns secret, even after claiming he would release them to the public. He is the first president since Gerald Ford to not publicly reveal his tax returns. Even as his lawyers fight at the Supreme Court to keep his tax returns private, the president is fighting battles in lower courts in related matters.