GOP Sen. Lisa Murkowski Lisa Ann MurkowskiSenate GOP aims to confirm Trump court pick by Oct. 29: report Senate GOP sees early Supreme Court vote as political booster shot Pence defends Trump's 'obligation' to nominate new Supreme Court justice MORE (Alaska) said over the weekend that she is "likely" to support a resolution blocking President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's emergency declaration, which is expected to be sent to the Senate later this week.

"I want to make sure that the resolution of disapproval is exactly what I think it is, because if it is as I understand it to be, I will likely be supporting the resolution to disapprove of the action," Murkowski said in an audio recording provided to The Associated Press by an aide.

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Murkowski added in a separate interview with KTUU, an Alaska TV station, that she would "probably" vote for the resolution of disapproval.

"When I say probably, I want to make sure that what in fact we are voting on when it comes to the Senate is what I believe it is. If it's what I have seen right now, I will support the resolution to disapprove," Murkowski said.

She said that she was likely supporting the resolution not because she disagrees with Trump on border security but stressed that there needed to be "clear lines" on "the separation of powers, the institution of the Congress as that appropriating branch."

"You're going to see a lot of drama in the next couple of weeks," Murkowski said.

Trump announced earlier this month that he would declare a national emergency to construct the U.S.-Mexico border wall after Congress gave him $1.3 billion for barriers — considerably less than the $5.7 billion he had requested.

His decision sparked bipartisan backlash on Capitol Hill. House Democrats filed a resolution to block the emergency declaration on Friday. House Speaker Nancy Pelosi Nancy PelosiPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare House lawmakers reach deal to avert shutdown Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (D-Calif.) told reporters that it would be on the floor for a vote on Tuesday, where it's expected to pass.

Senate Democrats are expected to "soon" introduce a similar resolution, according to a statement released by Senate Minority Leader Charles Schumer Chuck SchumerSenate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' Jacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee MORE (D-N.Y.) late last week.

If all 47 Democrats vote for the resolution to block Trump's declaration, they will still need to flip four Republicans in order to send the measure to the president's desk, where he's said he will veto it.

Several Republicans have voiced concerns about the emergency declaration. Trump, in a tweet on Monday morning, urged Republican senators to be "strong and smart" when a vote comes before the Senate.

"I hope our great Republican Senators don’t get led down the path of weak and ineffective Border Security. Without strong Borders, we don’t have a Country - and the voters are on board with us. Be strong and smart, don’t fall into the Democrats 'trap' of Open Borders and Crime!" he wrote in the tweet.

Sen. Susan Collins Susan Margaret CollinsSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (Maine) was the first Republican senator to say that she will vote for the resolution of disapproval and voiced concerned that Trump's decision could negatively impact projects in her home state.

"I believe it will pass the House, and, I don't know what the vote situation will be in the Senate, nor do I know exactly what that resolution will say but it is a privileged matter. That means that it will come before the Senate for a vote, and if it's a clean disapproval resolution, I will support it," she told reporters in Maine last week.