WASHINGTON—The White House declared Tuesday it would not participate in the House impeachment inquiry into President Donald Trump. In a letter to House Speaker Nancy Pelosi of California and other top Democrats, White House counsel Pat Cipollone accused them of violating the due process of law by not holding a formal vote in the House to open the impeachment inquiry.

WASHINGTON—Lawmakers from both parties warned Monday that the Turkish military could attack Kurds in Syria once U.S. troops leave the area. Senate Majority Leader Mitch McConnell, R-Ky., criticized President Donald Trump’s decision to withdraw from northeastern Syria, saying, “I urge the president to exercise American leadership to keep together our multinational coalition to defeat ISIS”—a coalition in which the Kurdish Syrian Democratic Forces played an important role.

U.S. District Judge Victor Marrero on Monday rejected President Donald Trump’s challenge to the release of eight years’ worth of his tax returns to the Manhattan district attorney. But Trump’s attorneys immediately appealed the ruling, and the 2nd U.S. Circuit Court of Appeals granted a temporary stay “pending expedited review” of the case.

WASHINGTON—A second whistleblower has come forward with direct knowledge of President Donald Trump’s dealings with Ukraine, attorney Mark Zaid said Sunday. Zaid, who represents both whistleblowers, said the second one can corroborate the initial complaint with first-hand information.

WASHINGTON—House Democrats have released a slew of text messages between U.S. diplomats and a Ukrainian aide that they say prove President Donald Trump wanted foreign leaders to undermine his political rivals. Former special envoy to Ukraine Kurt Volker turned over the messages Thursday.

WASHINGTON—President Donald Trump on Thursday called on China to investigate the business dealings of former Vice President Joe Biden’s son. The president raised the concern to reporters at the White House as former special envoy to Ukraine Kurt Volker gave a closed-door deposition to several House committees as part of their impeachment inquiry.

House Democrats on Monday subpoenaed Rudy Giuliani, President Donald Trump’s personal lawyer, for documents related to his interactions with officials in Ukraine. The lawmakers, who have launched a presidential impeachment investigation, said Giuliani “acted as an agent of the president in a scheme to advance his personal political interests.”