With one of the most crucial midterm elections in recent US history less than a week away, early voter turnout appears to have nearly doubled from 2014, shattering records along the way.

The 2014 midterms saw 12,938,596 total votes cast with six days before the elections, compared to 24,024,621 total votes cast by Wednesday.

Meanwhile, battleground states like Texas – where progressive candidates like Beto O’Rourke have threatened to unseat Republican incumbents like Ted Cruz – have seen record-level early voter turnout ahead of Election Day.

The 2018 figures are atypical for midterm elections, which generally see far fewer ballots during early voting and on Election Day; in fact, this year’s early voter turnout is more comparable to a presidential election season.

For example, 2016, saw just over 29m votes cast with six days to go until the election.

Records have been shattered across the country, including in the Lone Star state where Harris County saw the largest number of voters on the first day of early voting ever, casting more than 63,000 ballots.

US midterm elections: the voters Show all 10 1 /10 US midterm elections: the voters US midterm elections: the voters Ross Kershey of Exton, Pennsylvania objects to President Trump's recent threat to unilaterally suspend the constitutional protection of birthright citizenship as a way to control undocumented immigrants AP US midterm elections: the voters Thomas Jakel of Eveleth Minnesota is a former miner. The economy is the most important thing to voters in his town AFP/Getty US midterm elections: the voters Jerry Mcneff of Exton, Pennsylvania intends to split his ballot between the parties for Pennsylvania's House, Senate and governor elections AP US midterm elections: the voters Jean Hoffman of Exton, Pennsylvania has concerns about the cost of her daughters' college education. She thinks that voting Republican might help extend the economy's rise AP US midterm elections: the voters Supporters attend a rally of President Trump in Rochester, Minnesota AFP/Getty US midterm elections: the voters Supporters attend a rally of President Trump in Rochester, Minnesota Reuters US midterm elections: the voters Supporter Jenny Haley and son wait in line to see a Trump Rally in Rochester, Minnesota AFP/Getty US midterm elections: the voters Dick Calef of Exton, Pennsylvania is a life-long Republican. He credits the economic gains in suburban Philadelphia to longer-term factors beyond Trump's policies, such as the growth of internet and health care companies. He's not yet sure how he will vote AP US midterm elections: the voters Markus Fasel of Mendota Heights, Minnesota attends a campaign event for Democrat Angie Craig, his favoured congressional candidate AFP/Getty US midterm elections: the voters Supporters attend a rally of President Trump in Rochester, Minnesota Reuters

Both Democrats and Republicans alike have been casting their ballots early, with 43 per cent of the total early voter turnout being Republican voters and 41 per cent being Democrats, according to NBC News.

Those levels are comparable to 2016, which saw 43 per cent of Democrats and 40 per cent of Republicans making up the total turnout with just six days left until the election.

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Donald Trump has scheduled nearly a dozen remaining rallies nationwide to campaign for conservative lawmakers who support his “America First” agenda, and reportedly plans to continue injecting himself into local races ahead of the midterms.