Supreme Court nominee Brett Kavanaugh seems on track for confirmation, as moderate Sens. Susan Collins Susan Margaret CollinsClub for Growth to spend million in ads for Trump Supreme Court nominee Maryland's GOP governor says Republicans shouldn't rush SCOTUS vote before election The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November MORE (R-Maine) and Lisa Murkowski Lisa Ann MurkowskiClub for Growth to spend million in ads for Trump Supreme Court nominee Pebble Mine CEO resigns over secretly recorded comments about government officials Maryland's GOP governor says Republicans shouldn't rush SCOTUS vote before election MORE (R-Alaska) have not signaled plans to oppose his confirmation despite strong lobbying over their votes.

Neither moderates voiced any misgivings at a meeting of the entire GOP conference Wednesday that was devoted to discussing Kavanaugh’s nomination, according to lawmakers in the room.

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Sen. Orrin Hatch Orrin Grant HatchBottom line Bottom line Senate GOP divided over whether they'd fill Supreme Court vacancy MORE (R-Utah), a senior member of the Judiciary Committee, predicted that Collins and Murkowski will support Kavanaugh.

“I can’t speak for them, but I’m just pretty sure they’ll be there,” he said. “He’s a good guy. There’s nothing controversial about him other than he’s a Republican and a conservative.”

Kavanaugh has already met with a handful of Republican senators and received strong reviews.

Republicans effectively control a 50-49 seat majority because Sen. John McCain John Sidney McCainThe Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' Cindy McCain: Trump allegedly calling war dead 'losers' was 'pretty much' last straw before Biden endorsement MORE (R-Ariz.) is away from Washington indefinitely while undergoing treatment for brain cancer.

If Democrats hold their ranks opposing him, a single Republican defection would be enough to sink Kavanaugh.

Liberal groups such as Demand Justice, NARAL Pro-Choice America and Protect Our Care are spending millions of dollars in Maine and Alaska to pressure the two moderate GOP senators to vote against Kavanaugh.

Demand Justice is expected to spend $5 million on a broad advertising campaign targeting Collins and Murkowski, as well as centrist Democrats up for reelection in Indiana, North Dakota and West Virginia.

NARAL Pro-Choice America this week announced a six-figure ad buy covering Maine and Alaska as well as Nevada and Colorado, where moderate Sens. Dean Heller Dean Arthur HellerOn The Trail: Democrats plan to hammer Trump on Social Security, Medicare Lobbying World Democrats spend big to put Senate in play MORE (R-Nev.) and Cory Gardner Cory Scott GardnerCook Political Report shifts Colorado Senate race toward Democrat Overnight Health Care: US coronavirus deaths hit 200,000 | Ginsburg's death puts future of ObamaCare at risk | Federal panel delays vote on initial COVID-19 vaccine distribution The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting MORE (R-Colo.) face tough reelections in 2018 and 2020, respectively.

But Collins, who has begun to review Kavanaugh’s record, said Thursday that pressure from outside groups won’t have any effect.

“I’m going to make my own decision, as I always have,” Collins told reporters.

“If the Democrats think the pressure campaign that they unleashed in Maine, including $3 million for the television, radio and online ads is going to have an impact on me, they’re sorely mistaken,” she said. “It would be better if they put that money to better use.”

Collins has praised Kavanaugh’s “impressive credentials,” though she cautions she hasn’t yet made up her mind.

“How can anyone argue that someone who served on the circuit court for more than decade and has sterling academic credentials and teaches law is not qualified? But that’s only one part of the test,” she said. Kavanaugh currently sits on the U.S. Court of Appeals for the District of Columbia Circuit.

Collins says she has only just begun reading Kavanaugh’s more than 300 legal opinions and has already submitted inquiries to the Congressional Research Service.

Democrats say it’s way too early to say whether Kavanaugh will get the 50 votes needed to secure his Senate confirmation.

“There are a million pages to read, it’s way too soon to say this is over,” said a Senate Democratic aide, referring to the nominee’s voluminous record as a judge.

Murkowski says she feels more comfortable with Kavanaugh than she would have felt had President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE picked someone else from the list released by the White House of 25 potential Supreme Court nominees. The list was vetted by the conservative Federalist Society.

“I think it’s fair to say there were some folks on the list, just based on the very shallow background that we had on them, who would have been more difficult,” she said.

Murkowski says she plans to spend Friday, Saturday and Sunday doing a “deep dive” into Kavanaugh’s work.

Kavanaugh is getting a big boost with the GOP moderates from Sen. Rob Portman Robert (Rob) Jones PortmanMcConnell locks down key GOP votes in Supreme Court fight Romney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery MORE (R-Ohio), who worked closely with the nominee in the George W. Bush administration. Kavanaugh served as White House staff secretary and Portman headed the White House budget office.

Portman is close with Collins and Murkowski — all three teamed up to protect the expansion of Medicaid in the 2017 health-care debate — and has spoken to both of them to bolster Kavanaugh.

Portman has vouched for Kavanaugh’s values and integrity to his colleagues.

“He’s a guy with great compassion, great humility and a big heart,” Portman said on the Senate floor Thursday afternoon.

He noted that Kavanaugh served meals to the homeless after spending much of Wednesday meeting with senators on Capitol Hill.

Republican leaders are confident they will match or exceed the 54 votes that Neil Gorsuch, President Trump’s first Supreme Court nominee, received last year.

That would mean keeping the GOP conference unified as well as picking up four or five Democratic votes.

“I would hope we could duplicate, at minimum, what we were able to see with Judge Gorsuch, which was 54 votes,” said Senate Republican Whip John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE (Texas).

Republicans are pointing to a new Tarrance Group poll showing a majority of voters in several Senate battleground states — Florida, Indiana, Missouri, North Dakota and West Virginia — want their Democratic senators to vote for Kavanaugh.

So far most red-state Democrats are staying quiet about their votes, but one senator, Joe Manchin Joseph (Joe) ManchinManchin defends Supreme Court candidate Barrett: 'It's awful to bring in religion' The Hill's Morning Report - Sponsored by Facebook - Trump, GOP allies prepare for SCOTUS nomination this week Trump meets with potential Supreme Court pick Amy Coney Barrett at White House MORE (D-W.Va.), has praised the nominee.

Manchin praised Kavanaugh in a radio interview for having “all the right qualities” of a Supreme Court justice.

Democrats also think there might be a chance that libertarian Sen. Rand Paul Randal (Rand) Howard PaulRand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case Overnight Health Care: Health officials tell public to trust in science | Despair at CDC under Trump influence | A new vaccine phase 3 trial starts Health officials tell public to trust in science MORE (R-Ky.) or conservative Sen. Mike Lee Michael (Mike) Shumway LeeMcConnell shores up GOP support for coronavirus package McConnell tries to unify GOP Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump MORE (R-Utah), two outspoken critics of the Patriot Act and warrantless surveillance, could turn against Kavanaugh because of concerns with his views on the Fourth Amendment, which establishes a constitutional right to privacy.

A Senate Democratic aide said a document could emerge from Kavanaugh’s time with the Bush administration revealing some involvement in the decision to authorize warrantless surveillance.

But whether such a document exists is purely speculative.

Paul says he will keep an “open mind” on Kavanaugh and has requested additional information from the nominee.

A Republican senator who requested anonymity predicted that Paul may “grouse in private” about Kavanaugh but will ultimately vote for him.

The same source described Lee as “effusive” of Kavanaugh in private conversations.