Democrats are charging ahead with their impeachment inquiry despite a White House vow not to cooperate in the investigation, all but daring President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE to stonewall the probe and add fuel to allegations that obstruction itself is an impeachable offense.

The White House escalated the standoff between Democrats and the president on Tuesday in a letter disregarding the impeachment probe as illegitimate and warning it won't respond to congressional requests for information.

ADVERTISEMENT

Yet Democrats on Wednesday said they expected nothing less from an administration that for months has largely refused to cooperate in the House Judiciary Committee's examination of Trump's role in Russian election meddling.

As the focus now shifts to the Intelligence Committee's scrutiny of the president's dealings with Ukraine, Democrats are responding to the White House stonewalling with a collective yawn, arguing that their aggressive investigation will carry on — perhaps assisted by the president's defiance.

"Nothing changes," said a senior Democratic aide. "We're going to continue to press forward. If he continues down the path he’s on, we'll keep counting it in that category of obstruction.

"Just fall into this trap if you want to."

Rep. Jamie Raskin Jamin (Jamie) Ben RaskinOVERNIGHT ENERGY: House passes sweeping clean energy bill | Pebble Mine CEO resigns over secretly recorded comments about government officials | Corporations roll out climate goals amid growing pressure to deliver On The Money: House panel pulls Powell into partisan battles | New York considers hiking taxes on the rich | Treasury: Trump's payroll tax deferral won't hurt Social Security House panel pulls Powell into partisan battles over pandemic MORE (D-Md.) offered a similar assessment, arguing that Trump's refusal to comply with congressional requests for documents and witness testimony will simply boost the Democrats' case that he's a lawless president, worthy of impeachment.

"They've been obstructing us for months in our investigation. This clearly becomes another impeachable offense," Raskin, a member of the Oversight Committee, said Wednesday by phone.

"Essentially, they're writing their own impeachment articles with all of their obstructionism," he added.

ADVERTISEMENT

The comments arrive as the Democrats' impeachment effort has gone from a slow slog to a rolling boil in just a matter of weeks, following allegations from a government whistleblower that Trump leveraged U.S. military aid to Ukraine in return for political favors from the country's president, Volodymyr Zelensky.

Trump has vehemently denied any quid pro quo. But the news prompted Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.), who had long resisted the impeachment effort, to endorse an inquiry into whether Trump, in pushing Zelensky to investigate former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE, had enlisted foreign help to boost his reelection chances.

Behind Intelligence Committee Chairman Adam Schiff Adam Bennett SchiffSchiff to subpoena top DHS official, alleges whistleblower deposition is being stonewalled Schiff claims DHS is blocking whistleblower's access to records before testimony GOP lawmakers distance themselves from Trump comments on transfer of power MORE (D-Calif.), Democrats have moved swiftly to gather evidence, issuing subpoenas and deposing witnesses with insights into the whistleblower charge.

The effort has been only partially successful.

Republicans in the White House and on Capitol Hill have made clear they deem the impeachment inquiry to be illegitimate, since Pelosi has refused to stage a floor vote to launch the process officially. Such votes preceded the last two impeachment proceedings, targeting Presidents Nixon and Clinton, and GOP leaders contend the absence of such a vote denies Republicans certain legal tools to mount a defense of Trump, including the power of the minority party to issue subpoenas.

After allowing testimony from two witnesses last week — Kurt Volker Kurt VolkerGOP senators request details on Hunter Biden's travel for probe Yovanovitch retires from State Department: reports Live coverage: Senators enter second day of questions in impeachment trial MORE, former special envoy to Ukraine, and Michael Atkinson, inspector general of the intelligence community — the White House blocked Tuesday's scheduled deposition of a third State Department official, U.S. Ambassador to the European Union Gordon Sondland. And hours later, White House counsel Pat Cipollone delivered a letter to Pelosi warning that the administration had no intention of responding to "legally unsupported demands."

"As you know, you have designated and implemented your inquiry in a manner that violates fundamental fairness and constitutionally mandated due process," Cipollone wrote.

There's no constitutional requirement that the House vote to launch an impeachment inquiry. And Democrats wasted no time vowing to press on with their investigation, with or without cooperation from Trump.

"We expect this kind of behavior from him," Rep. Adriano Espaillat Adriano de Jesus Espaillat CabralLawmakers call for small business aid at all levels of government The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy On the Money: Administration to ban TikTok, WeChat | House moves toward bill to avoid government shutdown | Coronavirus relief bills boosted GDP, CBO says MORE (D-N.Y.), a member of the Foreign Affairs Committee, told The Hill on Wednesday. "It will help us, and bolster our position that, in fact, he may be engaged in another obstruction of justice [offense]. And another article of impeachment could derive from that."

Trump said Wednesday said he might be willing to cooperate with the impeachment inquiry, but only if House Democrats hold a formal vote to outline rules for the investigation and if those rules "are fair."

“We would if they give us our rights. It depends," Trump said when asked during an event in the Roosevelt Room of the White House.

Asked again to clarify his position, Trump reiterated that he would collaborate with Democrats "if the rules are fair."

The Democrats' strategy is multi-tiered.

In the near-term, they intend to press for more documents and witness testimony related to the Ukraine affair — and issue subpoenas in cases when those witnesses fail to comply. Sondland was on the receiving end of such a subpoena Tuesday.

One potential witness Democrats are eyeing is William Taylor, the U.S. chargé d'affaires of Ukraine, who had expressed concerns last month that Trump had crossed a line by dangling military aid to pressure Zelensky for political favors.

"He's an obvious witness," Rep. Peter Welch Peter Francis WelchShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Vermont Rep. Peter Welch easily wins primary Vermont has a chance to show how bipartisanship can tackle systemic racism MORE (D-Vt.), a member of the Intelligence and Oversight committees, said Wednesday by phone.

The next test will come Friday, when Marie Yovanovich, the former U.S. ambassador to Ukraine who was recalled in May, is scheduled to be deposed by the three committees — Intelligence, Oversight and Foreign Affairs — leading the investigation.

An official working on the impeachment inquiry said the expectation is that Yovanovich will appear. But a number of Democrats are voicing their doubts.

"Given the way that Trump's been behaving," said Welch, "I expect he'd stop that as well."

Looking further ahead, Democrats are planning to put new pressure on Trump's Republican allies in Congress by staging a series of votes in the coming weeks on legislation designed to protect U.S. elections from foreign interference. In September, after months of resistance, Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellDemocratic senator to party: 'A little message discipline wouldn't kill us' House to vote on resolution affirming peaceful transition of power Republican lawyers brush off Trump's election comments MORE (R-Ky.) reversed course and agreed to advance legislation providing $250 million to boost election security.

Democrats are readying similar bills this month.

"They're going to have to explain why they believe it’s OK for the president to invite a foreign country to interfere in our elections and undermine the very bedrock of our democracy," the senior Democratic aide said. "That's part of the objective when we get back."

House lawmakers are slated to return to Washington next week.

Some Democrats on key committees are also eyeing contempt of Congress votes against witnesses who fail to comply with subpoenas — or the administration officials who have blocked their testimony. Raskin mentioned Secretary of State Mike Pompeo Michael (Mike) Richard PompeoWatchdog confirms State Dept. canceled award for journalist who criticized Trump Trump's push for win with Sudan amps up pressure on Congress Putin nominated for Nobel Peace Prize MORE, who has put the brakes on such testimony, as one potential target.

"We have the power in Congress to hold these people in contempt and to insist upon their compliance," said Raskin, a former constitutional law professor.

Less clear is whether Schiff and the Intelligence Committee will pursue their ignored subpoenas in the courts. That was the strategy adopted by Judiciary Chairman Jerrold Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.), who's still awaiting those rulings.

But Schiff, while leaving the door open to litigation, has hinted that he'll skip the lawsuits and simply deem non-compliance more evidence of impeachable obstruction.

The reason is rooted in expediency, but also evidence, as Democrats view both the whistleblower complaint and Trump's phone call with Zelensky — a summary of which was released by the White House last month — to be virtual smoking guns that already implicate Trump in criminal wrongdoing.

"To the Speaker’s point, Trump confessed," said the senior aide. "That makes this very different from the other situation."

The ultimate question is whether the Democrats' inquiry will lead to articles of impeachment — and if so, when.

Raskin said the "commonsense timetable" is that "this needs to happen before Thanksgiving."

"And most members are agreeing with that," he said.

Democrats have scheduled a conference call Friday afternoon to discuss their plan forward.

Other lawmakers agreed that the process has evolved to the point that votes on impeachment articles are inevitable, and Democrats are merely awaiting word from Pelosi on when they'll take place.

"At a certain point we'll have to make our decision as to how and when to proceed. But I think we will proceed," said Welch. "And she'll be the principal one making that decision."

Cristina Marcos contributed.