Republican presidential nominee and former U.S. President Donald Trump makes a campaign speech at the Johnny Mercer Theatre Civic Center in Savannah, Georgia, U.S. Sep. 24, 2024. / Reuters/Megan Varner

NEW YORK (Reuters) - Republican presidential candidate Donald Trump has made tariffs and tax cuts the key elements of his economic pitch to voters, the majority of whom view the economy as the biggest campaign issue of the 2024 presidential election.

Several prominent budget forecasters have estimated that Trump's tax cut plans would add some $3.6 trillion to $6.6 trillion to federal deficits over a decade, depending on which proposals are included. The same forecasters show Harris' spending and tax break plans would add far less to deficits and possibly may reduce them, with a range of a $400 billion reduction over a decade to a $1.4 trillion increase, depending on which proposals are included.

Here are the tariff and tax proposals Trump has made so far in his campaign:

TARIFFS ON IMPORTS

Trump has floated plans for blanket tariffs of 10 to 2 percent on virtually all imports as well as tariffs of 60 percent or more on goods from China, in a bid to boost U.S. manufacturing.

On Sept. 23 Trump said he would slap a 200 percent tariff on John Deere's imports into the United States if the company moved production to Mexico as planned, comments that hit the agricultural equipment manufacturer's share price.

Trump has frequently said he would hit automakers that move their production to Mexico with a 200 percent tariff, but his Sept. 23 remarks appeared to be the first time he has extended that threat to an agricultural equipment company. The duties would likely violate the U.S.-Mexico-Canada Agreement on trade that he signed into law in 2020.

During a Sept. 24 speech in Georgia, Trump said he would put 100 percent tariffs on every car coming across the U.S.-Mexico border. He also said he would reward U.S.-based manufacturers with R&D tax credits.

The National Retail Federation, which represents Walmart and other companies that account for almost half of container shipping volume, is among the industry groups opposed to Trump's proposed tariffs, and economists say they would reignite inflation.

A narrow majority of U.S. voters support Trump’s campaign vow to increase tariffs on imported goods, particularly from China, according to a Sept. 11-12 Reuters/Ipsos poll.

TAX CUTS FOR DOMESTIC PRODUCERS

In early September Trump pledged to reduce the corporate tax rate from 21 to 15 percent for companies that make their products in the U.S.

While he had previously said he wanted to cut the corporate tax rate to 15 percent, he had not tied that lower rate to keeping manufacturing inside the country.

Trump slashed the corporate tax rate to 21 percent from 35 percent during his 2017-2021 presidency.

NO TAX ON OVERTIME PAY, TIPS OR SOCIAL SECURITY INCOME

Trump said on Sept. 12 that if he is elected he will end all taxes on overtime pay as part of a wider tax cut package.

Trump has also said he would seek legislation to end the taxation of tips. Harris has made a similar pledge. Current law requires employees to report their tips as income.

Trump has also vowed to exempt Social Security income from taxes.

EXTEND TAX CUTS

Trump wants to extend all individual tax cuts he pushed through Congress in 2017, including for the wealthiest Americans, which tax and budget experts estimate would reduce revenue over a decade by about $3.3 trillion to $4 trillion.

UNCLEAR PROPOSAL ON 'SALT' DEDUCTION

In a Sept. 17 Truth Social post, Trump vowed to “get SALT back” – a reference to the state and local tax (SALT) deduction available to federal taxpayers. At a rally the next day, Trump said he would be “restoring the SALT deduction” if re-elected. Trump’s 2017 tax cuts imposed a $10,000 cap on the amount of state and local tax that taxpayers can deduct. It was unclear whether Trump was suggesting that he would remove the $10,000 cap, which predominantly affects high-tax, Democratic-leaning states such as New York.

OTHER ECONOMIC PROPOSALS

Beyond tax cuts and tariffs, Trump has promised he would support the oil and gas industry by backing new pipelines and restoring fracking on federal land in a bid to boost the economy. On Sept. 24 he said he would put Alaska's Arctic National Wildlife Refuge - where the Biden administration canceled oil and gas drilling leases - "back into play" if he wins the election.

He has also said he would consider ending a $7,500 tax credit for electric-vehicle purchases. While president, Trump sought to repeal the EV tax credit which was later expanded by President Joe Biden in 2022.

During a Sept. 18 campaign rally in New York, Trump pledged to put a temporary cap on credit card interest rates of “around 10 percent.”