House Republicans are looking to expand their strategy in the impeachment fight beyond criticizing the process by highlighting portions of recently released transcripts from closed-door depositions they feel help counteract attacks on 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's interactions with Ukraine.

GOP lawmakers have repeatedly accused Democrats of conducting a probe that lacks transparency, “cherry-picking” the information released to skew the narrative and opting to focus on impeachment over legislating. Those lines of attack are expected to continue as the investigation moves into a more public phase.

But with the release of the transcripts of depositions from former U.S. Ambassador to Ukraine Marie Yovanovitch and State Department official Michael McKinley on Monday — with more slated to be released throughout the week — Republicans are being provided with guidance on their latest line of defense, one that places more of an emphasis on substance.

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"Conference has sent out messaging guidance," one senior GOP source told The Hill, "basically highlighting all the parts in the transcript where these people admitted no firsthand knowledge, acknowledged the president can put whoever he wants in these positions and that Trump was actually tougher on Russia with regards to Ukraine than Obama was."

Following the release of the two depositions, House 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.), acting House Oversight and Reform Committee Chairwoman Carolyn Maloney Carolyn Bosher MaloneyPelosi, Democrats unveil bills to rein in alleged White House abuses of power Government watchdog recommends creation of White House cyber director position Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.), and Foreign Affairs Committee Chairman Eliot Engel Eliot Lance EngelHouse panel halts contempt proceedings against Pompeo after documents turned over Engel subpoenas US global media chief Michael Pack The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE (D-N.Y.) released a statement saying the content of the transcripts “demonstrates the contamination of U.S. foreign policy by an irregular back channel that sought to advance the President’s personal and political interests, and the serious concerns that this activity elicited across our government.”

But GOP lawmakers are pushing back, citing a number of exchanges from the hearings that draw into question witnesses' firsthand knowledge of the concerns laid out in the whistleblower's report that sparked the inquiry.

They plan to question McKinley’s role as a key witness, recounting his comments that he "was not aware at the time of the efforts of Ambassadors Volker and Sondland to work with the President's personal attorney, Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE" and "was not aware at the time of the President's phone call with President Zelensky."

The arguments laid out for Republicans also look to emphasize McKinley’s comments that "every President has the right to remove an ambassador they don’t have confidence in. And this is standard, and it’s part of Department practice ever since I’ve come in. So, whatever the rationale, presidents have the right to remove ambassadors and select other envoys for the post in question."

They note that he didn’t speak with anyone at the State Department about Giuliani and that he said “Ukraine was not among the issues I followed with Secretary Pompeo.”

The key points on Yovanovitch highlight an exchange on the ambassador’s knowledge of Trump’s “deep-rooted skepticism about Ukraine’s business environment,” point to her remarks that the Trump Administration’s policy toward Ukraine “actually got stronger over the three last three years” and cite an instance where an Intelligence Committee staffer reached out to her on her personal email in August.

The GOP guideline also points to Yovanovitch responding, “If that’s what took place” when asked by a GOP member if “Ambassador Volker mentioned the fact that to the extent there are corrupt Ukrainians and the United States is advocating for the Ukraine to investigate themselves, that certainly would be an appropriate initiative for U.S. officials to advocate for.”

At the same time, Trump’s top defenders have also leaned into their arguments on the impeachment process, hammering Democratic chairmen for gradually releasing the transcripts and continuing to hold depositions behind closed doors this week.

“Democrats cherry pick which transcripts they release and when. Why not release Ambassador Volker’s testimony? He was the very first witness to testify!” Rep. Jim Jordan James (Jim) Daniel JordanHouse panel pulls Powell into partisan battles over pandemic Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election House passes resolution condemning anti-Asian discrimination relating to coronavirus MORE (R-Ohio) tweeted.

Schiff told reporters Monday he expects the transcripts for Ambassador to the European Union Gordon Sondland and former special envoy to Ukraine 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 to be released Tuesday.