TEHRAN - Bernie Sanders, the old American senator, and one of Democratic nominees for the 2016 presidential election, continues to oppose U.S. President Donald Trump. This confrontation started at the time Trump entered the White House (by early 2017).

Sanders, in one of his most recent positions against the White House, called for an end to Washington's support for Riyadh in the Yemeni war. Sanders also condemned Trump's stance on the murder of Jamal Khashoggi. At any rate, Sanders's recent position against Trump has led to the U.S. President's concerns.

Sen. Bernie Sanders says it would be an "impeachable offense" if President Trump were to fire Robert Mueller the special counsel leading the federal probe into ties between Trump campaign associates and Russia.

"I've been very reluctant to talk about impeachment until we have all the information coming in from the investigation. But that would be a major, major, major obstruction of justice. That would be an impeachable offense in my view," Sanders said in an interview for The Intercept's newly launched podcast "Deconstructed" released Friday.

In his tweet, Sanders was referring Jeff Sessions, Trump's Justice Minister, and his forced resignation. Trump fired Attorney General Jeff Sessions, replacing him with a loyalist who has echoed the president’s complaints about the special counsel investigation into Russia’s election interference and will now take charge of the inquiry.

Sessions delivered his resignation letter to the White House at the request of the Trump. As reported by the Hill, Trump has long voiced frustration with the investigation into possible collusion between the Trump campaign and Russia during the 2016 presidential race, a probe that has also looked at whether Trump tried to obstruct the investigation.

Anyway, Bernie Sanders does not intend to simply surrender to Donald Trump!

The fact is, according to polls conducted in 2016, Sanders had a much greater chance of winning the U.S. presidential elections. Many Democratic voters believed that Sanders could have an important role in regulating power in America as a symbol of change in the United States.

Although such an idea was wrong due to the political structure in the U.S., it was, however, strongly accepted by some Democrat supporters. On the other hand, Hillary Clinton, the Democratic candidate who was supported by her husband, Bill Clinton, and many influential figures in the party, managed to defeat Sanders with her secret lobbies, and went to fight Trump as Democrats' final candidate.

Anyhow, if Sanders were to reach the final round of the 2016 presidential competitions, he could have defeated Trump and enter the White House. Sanders, however, was the victim of Democrat leaders and Hillary Clinton's secret lobbies. It was not without a reason that many Sanders advocates voted for Hillary Clinton's rival, Donald Trump!

Sanders now considers himself the United States' potential president! Although apparently he's unwilling to speak about the 2020 presidential election and hasn't confirmed his presence in the competition, Bernie Sanders supporters are calling for him to nominate himself for this political competition.

Some analysts in the United States note that Sanders's opposition to Donald Trump and the White House policies have paved the way for his re-appearance in the upcoming presidential election. However, it seems that the old Senator of the United States has not yet made his decision.

Polls recently conducted in the United States indicate Sanders' proper position among Democratic voters. Accordingly, Joe Biden and Bernie Sanders have both a good position among Democrat supporters and they both have a good chance to reach the final round of the 2020 presidential elections. However, it is not yet clear what would be Sanders ultimate decision on in the upcoming election: Will he nominate himself as the Democratic Party's candidate? Or will he support other figures such as Joe Biden?