The United States Postal Service, or popularly known as USPS, is known to deliver mail no matter the weather conditions.
However, it has been caught in the middle of a political contest during a historical period with the coronavirus pandemic.
Millions of American voters are expected to cast their ballots by mail to avoid contracting the Covid-19 virus.
Ahead of the November 3 election, President Donald Trump has launched an offensive at the USPS by withholding funds as part of a big coronavirus rescue package.
The cash-strapped agency needs more money and changes at USPS have caused delays in mail delivery.
"They need that money in order to have the post office work so it can take all of these millions and millions of ballots," Trump told Fox News on Thursday, adding, "But if they don't get those... that means you can't have universal mail-in voting."
With some states expanding mail-in options because of the pandemic, an estimated three-quarters of Americans will be able to vote from home this fall.
Increased mail-in voting, Republican Trump said Saturday, would be a "catastrophe" — an assertion contested by many election experts.