When Donald Trump announced his candidacy for president just over a year ago, he instantly found himself in the headlines after referring to illegal immigrants from Mexico as "rapists" and "murders." Since that time, Trump has been unable to avoid the constant cloud of controversy that has hovered over his campaign, with another issue coming to light over the weekend.

Trump's Russian ties

When Wikileaks released private DNC emails last week, exposing former Democratic National Committee Chair Debbie Wasserman Schultz of working to undermine the Bernie Sanders campaign, party officials quickly accused Russian politicians of being behind the initial hack, with the intention of aiding GOP nominee Donald Trump in the process.

Since that time, Trump has been linked to financial interests in Russia, including recent allegations by prominent conservative writer George Will. In response, the billionaire real estate mogul responded on Twitter on July 26, and was not happy.

"In order to try and deflect the horror and stupidity of the Wikileakes disaster, the Dems said maybe it is Russia dealing with Trump," Trump tweeted, stating, "Crazy!" The former host of "The Apprentice" didn't stop there, tweeting once again just minutes later. "For the record," Trump said, noting, "I have ZERO investments in Russia."

Tax issues

During an interview on Fox News on Tuesday, Will accused Trump of having possible financial ties to Russia, stating thatwas the reason he was refusing to release his prior tax returns.

Trump has claimed that his current audit by the IRS has prevented him from releasing his taxes, saying he won't be doing so before the election. IRS officials have have since responded, conflicting with Trump, and confirming that an audit would have no affect on releasing tax returns to the public.

Various reports have been released in recent months, all which have been able to expose partial tax years of Trump's financials, dating back to as far as the late 1970s.

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In those individual returns, Trump was found to have reported questionable information, including, but not limited to, his total amount earned each year, to what he ended up paying in taxes to the United States government.