Former New York City Mayor Michael R. Bloomberg arrives at Gala Dinner on the occasion of the World Mayors Summit in Christiansborg in Copenhagen, Denmark October 10, 2019. Ritzau Scanpix/Martin Sylvest via REUTERS ATTENTI

While the results could be a good omen for Democrats' chances in 2020, it may also be a tipping point in the money battle over gun rights. Everytown for Gun Safety, the gun-control advocacy group that the former New York mayor helps fund, spent $2.5 million this year to influence voters in Virginia versus approximately $300,000 by the NRA , which has its headquarters in Fairfax, Virginia.

In Tuesday's elections, the Democrats tipped the Virginia House and Senate in their favor, giving them full control of the state government for the first time since 1994 . The election had stronger-than-usual turnout in the suburbs, according to media reports.

A gun-control lobbying group funded largely by billionaire Michael Bloomberg just helped Democrats take over the state government in Virginia – right in the National Rifle Association's backyard.

"In the past, the NRA has had its way with lawmakers because it was considered powerful and wealthy, and that has dynamic changed drastically — even within the last year," said Shannon Watts, founder of Moms Demand Action, which is part of Everytown.

The NRA, in a statement, said "Virginians are about to experience life under a distant tycoon's thumb," referring to Bloomberg.

"Candidates who proudly accepted Bloomberg's cash — and every voter they misled — will soon realize the cost of being beholden to a Manhattan billionaire who despises Virginians' right to self-defense," the organization said.

Other issues, such as minimum wage and health care, were also a focus for voters in the election. But gun control was in the spotlight. Three in 4 voters rated gun policy, including mandatory background checks, a "very important" issue, according to a Washington Post-Schar School poll. A mass shooting in Virginia Beach left a dozen dead earlier this year, while massacres in Ohio, Texas and California also emboldened groups calling for tougher gun laws.

Bloomberg helped found Everytown for Gun Safety in 2014 to "end gun violence and counter the Washington gun lobby." The group put its focus beyond Congress, to bring attention to state elections and corporate boards, "fields of play formerly occupied almost solely by the gun lobby." Bloomberg has pledged to spend at least $50 million to support the cause. The group now has 350,000 financial backers, though Bloomberg remains a major contributor.

The group's influence has seeped into corporate boardrooms, too. The Virginia election came after a number of executives came out in favor of gun reform, amid Everytown's advocacy and a steady stream of mass shootings.

Walmart in September said it will discontinue all sales of handgun ammunition and sales of short-barrel rifle ammunition that can be used with military-style weapons, following two "horrific" shootings at Walmart stores this summer.

The same month, chief executives of 145 companies signed a letter urging the U.S. Senate to pass a bill mandating background checks. The list included leaders of companies like Levi Strauss, Gap and Beyond Meat.

H.R. 8, a bipartisan proposal, passed the Democratic-controlled House in February passed the Democratic-controlled House in February. The bill has yet to come to a vote in the GOP-controlled Senate. Senate Majority Leader Mitch McConnell has said he will not put any bill up for a vote unless he is sure that President Donald Trump would sign it.

The list of 145 executives did not include some of the country's largest or most powerful institutions such as J.P. Morgan Chase, Bank of America and Apple. It also did not included some of the largest companies headquartered in Virginia, such as Dollar Tree, General Dynamics, Capital One Financial and Northrop Grumman.

Bloomberg tweeted Tuesday night to celebrate the election results, calling out the influence of another group he helps fund, Beyond Carbon, a $500 million group that advocates for energy reform.

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