For the first time, the impeachment inquiry reached directly into the White House on Friday as Democrats subpoenaed officials about contacts with Ukraine and President Donald Trump signaled his administration would not cooperate.

The demand for documents capped a tumultuous week that widened the constitutional battle between the executive branch and Congress and sharpened the political standoff with more witnesses, testimony and documents to come.

Trump said he would formally object to Congress about the House impeachment inquiry, even as he acknowledged that Democrats “have the votes” to proceed. They’ll be sorry in the end, he predicted.

“I really believe that they’re going to pay a tremendous price at the polls,” Trump said.