Here are all of the ways people are trying to get Trump's tax returns

Opponents of President Trump have been vying for his tax returns for years. But congressional lawmakers aren't the only ones making plays for those financial records.

"They know the terms under law by which the IRS can give them the documents. But political hit job is not one of those reasons. So they know ... ," acting White House chief of staff Mick Mulvaney said. 

"To be clear, you believe Democrats will never see the president's tax returns?" Fox News anchor Bill Hemmer asked.

"Oh, no, never. Nor should they," Mulvaney said.

Democrats took control of the House in January, thereby taking control of what the House investigates. Rep. Richard Neal, chairman of the House Ways and Means Committee, formally asked the IRS for six years of President Trump's personal and business tax returns. The House Oversight Committee, led by Rep. Elijah Cummings, is trying to get 10 years of financial records from an accounting firm tied to the president. That request asks for both personal and business records.  

RELATED: Take a look at the Trump tax return protest in 2017: 

20 PHOTOS
Best signs from Trump tax return protests
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Best signs from Trump tax return protests
Demonstrators protest in response to President Donald Trump's refusal to make his tax returns public in Philadelphia, Pennsylvania, U.S. April 15, 2017. REUTERS/Mark Makela
Demonstrators protest in response to President Donald Trump's refusal to make his tax returns public in Philadelphia, Pennsylvania, U.S. April 15, 2017. REUTERS/Mark Makela
Demonstrators protest in response to President Donald Trump's refusal to make his tax returns public in Philadelphia, Pennsylvania, U.S. April 15, 2017. REUTERS/Mark Makela
People march demanding President Donald Trump release his tax returns, in New York, U.S., REUTERS/Lucas Jackson
People march demanding President Donald Trump release his tax returns, in New York, U.S., April 15, 2017. REUTERS/Lucas Jackson
People march demanding President Donald Trump release his tax returns, in New York, U.S., REUTERS/Lucas Jackson
People march demanding President Donald Trump release his tax returns, in New York, U.S., REUTERS/Lucas Jackson
Demonstrators protest in response to U.S. President Donald Trump's refusal to make his tax returns public, in Philadelphia, Pennsylvania, U.S. April 15, 2017. REUTERS/Mark Makela
Demonstrators protest in response to President Donald Trump's refusal to make his tax returns public in Philadelphia, Pennsylvania, U.S. April 15, 2017. REUTERS/Mark Makela
Demonstrators protest in response to President Donald Trump's refusal to make his tax returns public in Philadelphia, Pennsylvania, U.S. April 15, 2017. REUTERS/Mark Makela
Demonstrators protest in response to President Donald Trump's refusal to make his tax returns public in Philadelphia, Pennsylvania, U.S. April 15, 2017. REUTERS/Mark Makela
UNITED STATES - APRIL 15: Buddhist monk Jampal Rowe of Poolesville, Md., attends the Tax March rally on the west lawn of the Capitol to call on President Trump to release his tax returns, April 15, 2017. (Photo By Tom Williams/CQ Roll Call)
Protestors take part in the 'Tax March' to call on US President Donald Trump to release his tax records on April 15, 2017 in New York. / AFP PHOTO / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
Protestors walk by the Trump hotel during the 'Tax March' to call on US President Donald Trump to release his tax records on April 15, 2017 in Washington, DC. / AFP PHOTO / Mandel Ngan (Photo credit should read MANDEL NGAN/AFP/Getty Images)
Protestors take part in the 'Tax March' to call on US President Donald Trump to release his tax records on April 15, 2017 in New York. / AFP PHOTO / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
Protestors take part in the 'Tax March' to call on US President Donald Trump to release his tax records on April 15, 2017 in New York. / AFP PHOTO / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
Protestors take part in the 'Tax March' to call on US President Donald Trump to release his tax records on April 15, 2017 in New York. / AFP PHOTO / KENA BETANCUR (Photo credit should read KENA BETANCUR/AFP/Getty Images)
Protestors gather in Center City Philadelphia, PA, ahead of the April 15 Tax Day March. Around the nation thousands are expected to participate in similar protests against the Trump-administration. (Photo by Bastiaan Slabbers/NurPhoto via Getty Images)
Protestor holds a sign during a Tax Day protest rally and march in Center City Philadelphia, on April 15, 2017. Around the nation thousands are expected to participate in similar protests against the Trump-administration. (Photo by Bastiaan Slabbers/NurPhoto via Getty Images)
Protestors take part in the 'Tax March' to call on US President Donald Trump to release his tax records on April 15, 2017 in Washington, DC. / AFP PHOTO / Mandel Ngan (Photo credit should read MANDEL NGAN/AFP/Getty Images)
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Individual states are also looking at ways to publish the financial information of prospective presidents.

More than a dozen states are considering legislation that would require presidential candidates to release their tax returns. The details of the bills vary, but each one would make publicly releasing tax returns mandatory in order to be listed on the state's ballots. 

State lawmakers in New York are taking a slightly different tack. A bill there will aim to allow New York officials to release an individual or businesses' *state tax returns as part of a legislative investigation. The key difference here is the bill is focused on the state return, not the federal return. And in the case of President Trump, who lived much of his life based in New York, his state return is likely to contain a lot of the details people are so curious about.

The effort from the House Ways and Means Committee might have the best chance of actually getting the president's returns. Neal used a little-known tax law to make his request, and that law does not include any situations that would allow Treasury Secretary Steven Mnuchin to refuse it. 

But all of these efforts could face court challenges from any candidate who, like President Trump, doesn't want to release their returns. 

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