Georgia Secretary of State Brad Raffensperger's office announced Wednesday it has opened an investigation into Coffee County's handling of the election recount.

Raffensperger re-certified the statewide election results on Monday afternoon, after reporters had been told the re-certification would be done the prior Friday. Coffee County was the reason the certification had to be pushed.

While the county's hand audit was off by one vote compared to the county's original results, the machine recount was off by 51 votes. It was possible that the same batch of 50 ballots was inadvertently scanned twice, but the county's election director, Misty Martin, could not say for sure, according to Raffensperger's office.

The county issued a letter that "blamed the voting system for the 51-vote discrepancy, but Ms. Martin could not specify what machine problems were encountered."

The secretary of state's office told Martin she needed to figure out the issue, resolve it, and, if necessary, re-certify the results, but Martin said she wanted to use the election night results, which was not the protocol.

On Friday afternoon, Chris Harvey, the elections director in Raffensperger's office, called Martin, who told him she was experiencing an issue with the scanners. Harvey dispatched a Dominion tech.

Later, when Harvey tried to call Martin back to check on the progress, he couldn't get a hold of her, and later learned from Dominion that the county Board of Elections told Martin to go home and resume working Monday.

On Monday, Raffensperger's office told Martin and the county they needed to resume counting as soon as possible -- not noon as they planned -- because the state needed to re-certify. Martin did that.

"Every other county was able to complete this task within the given time limits," the press release said. "In some cases, counties realized they made mistakes in scanning ballots and had to rescan, or realized they neglected to scan some ballots and had to correct that error. But nonetheless, those counties completed the recount on time."

-ABC News' Quinn Scanlan

Trump filed a motion with the Supreme Court Wednesday night asking to formally join Texas' lawsuit against four battleground states in a bid to overturn the 2020 election.

"The number of ballots affected by illegal conduct of state elections officials greatly exceeds the current margin between Plaintiff in Intervention (Trump) and his opponent in the election for the Office of President (Biden) in each of the respective Defendant States, and the four Defendant States collectively have a sufficient number of electoral votes to affect the result of the vote in the Electoral College for the Office of President," Trump attorney John Eastman wrote in the filing. "Proposed Plaintiff in Intervention therefore clearly has a stake in the outcome of this litigation."

The accompanying complaint offers a distorted portrayal of Trump's electoral performance, repeating an array of unfounded claims and innuendo.

"It is not necessary for (Trump) to prove that fraud occurred," Eastman argued in the filing, "it is only necessary to demonstrate that the elections in the defendant States materially deviated from the 'manner' of choosing electors established by their respective state Legislatures."

"By failing to follow the rule of law, these officials put our nation's belief in elected self-government at risk," he added.

This is not the first time that Trump has tried to join an election case before the court. In November, he asked the justices to intervene in the Pennsylvania Republican Party's case challenging tabulation of late-arriving mail ballots. The court ignored his request.

-ABC News Senior Washington Reporter Devin Dwyer

Rep. Mike Johnson, R-La., emailed his Republican colleagues in the House and Senate Wednesday morning, rounding up support for an amicus brief for the Texas attorney general’s attempt to get the Supreme Court to intervene in the presidential election, according to an email obtained by ABC News.

The source who provided the email said he believed it was sent to all congressional Republicans, though that couldn't be confirmed by the text of the email.

Johnson wrote that he spoke to Trump on Tuesday night and that the president asked him to reach out to other members.

“He specifically asked me to contact all Republican Members of the House and Senate today and request that all join on to our brief,” Johnson wrote in large, underlined red letters.

“He said he will be anxiously awaiting the final list to review,” he added.

“The simple objective of our brief is to affirm for the Court (and our constituents back home) our serious concerns with the integrity of our election system,” Johnson wrote in the email. “We are not seeking to independently litigate the particular allegations of fraud in our brief (that is not our place as amici).”

“We will merely state our belief that the broad scope of the various allegations and irregularities in the subject states merits careful, timely review by the Supreme Court,” he added.

The president and his allies have mounted more than four dozen lawsuits in state and federal courts, most of which have been defeated.

-ABC News’ Rick Klein

Cobb County, Georgia, announced Wednesday it will add two more early voting locations during the last week of advance voting before the Senate runoffs there, bringing the total of open locations open during that time to seven.

The county will also no longer have early voting at the Ward Recreation Center, moving it to the Ron Anderson Community Center in Powder Springs. A spokesperson for the county said they thought this was a better/more accessible location.

The changes follow a letter from several organizations, including Georgia NAACP, Black Voters Matter, All Voting is Local Georgia and ACLU Georgia outlining the importance of maintaining 11 advance voting locations for the January runoff elections.

Stacey Abrams' organization, Fair Fight, joined those organizations' call Monday afternoon. Early voting in Georgia’s runoff elections begins Monday.

-ABC News' Quinn Scanlan

While the U.S. Supreme Court has twice refused to hear pro-Trump challenges to the 2020 elections, a federal judge in Wisconsin on Saturday joined the chorus of rulings against Trump in his effort to use the courts to invalidate Biden’s victory.

“This Court has allowed plaintiff the chance to make his case and he has lost on the merits,” wrote U.S. District Court Judge Brett H. Ludwig, a Trump appointee. Ludwig noted that the president had asked “that the Rule of Law be followed,” and he declared in response: “It has been.”

The ruling comes just one day after the U.S. Supreme Court refused to consider an election challenge brought by the Texas attorney general contesting the way elections were run in four states, including Wisconsin. Trump had called that case “the big one,” because he thought it held the best hopes for him of re-litigating the 2020 contest in court.

This latest ruling marks nearly 50 losses for the president  in cases brought by him and his supporters since election day. In Wisconsin, where Biden won by more than 20,000 votes, Trump asked for 221,000 absentee and mail-in ballots to be excluded on the grounds they were collected in ways not laid out by the state legislature. And the president argued that the legislature should be afforded the chance to select an alternate slate of electors.

Ludwig’s 23-page opinion gave wide latitude to Trump -- finding that the president had standing to file his election challenge and was not too late to raise his concerns about the way the election was conducted. But the outcome of the case was the same as rulings in other battleground states -- that Biden’s victory was attained legally and should not be thrown to a legislature to upend.

The president, Ludwig wrote, “has not proved” that state election officials violated his rights. “To the contrary, the record shows Wisconsin’s Presidential Electors are being determined in the very manner directed by the Legislature, as required by Article II, Section 1 of the Constitution.”

Ludwig further noted that if he followed the demands set out in Trump’s lawsuit, “any disappointed loser in a Presidential election, able to hire a team of clever lawyers, could flag claimed deviations from the election rules and cast doubt on the election results. This would risk turning every Presidential election into a federal court lawsuit over the Electors Clause.”

The Trump campaign has not yet responded to requests for comment.

At the moment the federal ruling was handed down, the Wisconsin Supreme Court was hearing arguments on a separate challenge to a recount of votes in the state, which had failed in a lower court.

-ABC News' Matthew Mosk and Alex Hosenball