National Republicans are ramping up efforts to defend the party’s hold on Georgia’s 6th Congressional District ahead of a special election next month.

The National Republican Congressional Committee released its first TV ad in the race reminding voters that April 18th is both Tax Day and Election Day and Republicans face a “crucial vote.”

The ad comes as Democratic candidate Jon Ossoff has gained traction in the race. A recent poll showed him leading the split Republican field and in a virtual dead heat in hypothetical matchups with the top GOP candidates.

The seat opened up when former Republican Rep. Tom Price was picked by President Donald Trump to serve as secretary of Health and Human Services.

The narrator warns that “Nancy Pelosi and Pelosi and liberal politicians are flooding into Georgia to try to stop our Republican majority that’s getting things done.”

“Republicans need your help to defend our values, bring back jobs, and lower taxes,” she continues.

“Special elections are all about voter turnout,” NRCC spokeswoman Maddie Anderson said in a statement, “This first NRCC ad in GA-06 focuses on ensuring that our Republican base, which is the majority of the District, turns out to vote on April 18th.”

The Congressional Leadership Fund also released a new 30-second ad as part of a now-$2.2 million independent expenditure campaign in the district against Ossoff.

The ad features images of people breaking windows and setting a limousine on fire on Inauguration Day and attempts to tie both Pelosi and Ossoff to the violent protesters, although most violent demonstrators were anarchists and not tied to the Democratic Party.

“Don’t let them hijack our congressional seat,” the ad says.