In this primary election, each candidate must answer a fundamental question: Which side are you on?

Are you on the side of working people, and are you willing to stand up against the greed and corruption of the corporate elite? Or are you on the side of the billionaires and corporations that are trying to buy the election?

As someone who comes from the working class, my answer has been clear for my entire life. I know where I came from and I know which side I am on: I have always stood with working people to fight for better wages, affordable health care, equal pay, and a secure retirement. I will fight for those priorities as president — whether billionaires like it or not.

You can see that our campaign is serious about taking on the billionaire class by taking a look at exactly how we differ from other campaigns. Our campaign does not do high-dollar fundraisers in wine caves or on Wall Street — and, as Forbes magazine recently pointed out, ours is the only leading campaign to not have a single billionaire donor.

Instead, our campaign is funded entirely by grassroots donors. Indeed, we have received more than 7 million contributions, and among the leading groups of donors are teachers, Amazon workers and Walmart workers.

This is a campaign of, by, and for working people, which is exactly the kind of strong grassroots campaign that is needed to defeat President Donald Trump. It is also the kind of campaign that will help us create a government that works for working people.

When we are in the White House, we are not going to continue coddling the insurance companies and the drug companies that are fleecing Americans. In Minnesota, 238,700 people are uninsured and many more are underinsured. By 2017, the average Minnesota family fortunate enough to have health insurance through an employer has been shelling out $18,507 in annual premiums. All of that is going to end. We will guarantee health care as a right to all our people through a Medicare for All program.

When we are in the White House, we are not going to keep giving fossil-fuel companies billions of dollars of taxpayer subsidies. We are going to transition to renewable energy and hold fossil-fuel executives accountable for their deliberate actions that created the climate crisis.

When we are in the White House, we will not let demagoguery and hateful rhetoric write immigration and asylum policies. We will keep families together and keep children out of cages; and we will stand with states like Minnesota that welcome refugees, asylum-seekers, and families who come to the United States in search of the American Dream.

When we are in the White House, we are not going to help billionaires and Wall Street executives secure new tax breaks for the wealthy and then pay for those tax breaks with cuts to Social Security that 1,032,697 rely on in Minnesota. We will do the opposite: We will start making the wealthy and large profitable corporations pay their fair share and expand the Social Security benefits on which so many people rely.

When we are in the White House, we are not going to sit by as corporations try to bust unions, reduce wages, and offshore jobs. We will strengthen workers’ rights, we will raise the minimum wage to $15 an hour, and we will rescind federal contracts for companies that shift jobs overseas.

And when we are in the White House, we are going to overturn the disastrous Citizens United decision and make sure that billionaires and corporations cannot continue to buy elections and buy legislation.

Doing all of this will not be easy. We are taking on Wall Street, the insurance companies, the drug companies, the fossil-fuel industry, and the whole damn 1%. But I am more confident than ever that we are on the verge of a great victory.

If we stand together and don’t let Trump divide us up, we can defeat the corruption that has undermined our democracy.

We can create an economy that expands and supports a vibrant middle class — rather than just enriching the billionaire class.

We can, in short, transform this country so that it works for all of our people.

Sen. Bernie Sanders, I-Vermont, is a candidate for the Democratic nomination for president. Similar versions of this column have been offered for publication in other states.