Why are all mainstream media slanted against Mr. Trump and run by communist media companies?

Mainstream media deals with facts and reality, two things that Chump avoids at all costs.

The media and Hollywood are highly liberal-socialist run organizations because journalists and actors are people interested in the arts such as creative writing and drama. Such people have to be sensitive intellectuals in order to do their jobs. That kind of person has empathy for the poor, making him or her a liberal.

Put your tinfoil hat on.

Journalists have acknowledged that they do have a slant. However, it's not the one you think. They are biased in favor of the little guy as apposed to the wealthy and powerful who trample and exploit the little guy. Is that enough information for you to determine to which group Donald Trump belongs?

I think most of the American voters who work in media are more left leaning.

Your avatar is not believable based upon the Russian TROLL type of spew, asker.

If not a Russian MAFIA bot spreading disinformation and division, then read the following books to become better acquainted with the TRUTH:

"The Making of Donald Trump" (2016), by Pulitzer Prize winning David Cay Johnston.

"Everything Trump Touches Dies" by Republican strategist Rick Wilson, 2019.

"Russian Roulette" by veteran investigative reporters Michael Isikoff and David Corn.

Then read the U.S. Constitution in its entirety. Russia has nothing to compare and you just might fall in love with the principles contained therein enough to abandon the Putin "kleptocracy" (Karen Daweesh, "Plutin's Kleptocracy: Who Really Owns Russia?" available online) and join the citizenry of our already great representative democratic republic where it is we, the people, who are the real government.

Trump partner since 2001: Felix Sater, the Russian-born son of a U.S.-active Russian MAFIA crime boss. When the 2015-2016 campaign cycle began no one in "all mainstream media" bothered to FULLY VET candidate Trump---they all gave in to the lust for ratings Trump's criminality and malignantly narcissistic brand of sociopathic personality disorder seemed to give network executives. Had candidate Trump been exposed as the life-long mobbed up corrupt lifts-wearing (5'10" pretending to be taller), bald (hair implants) old man Trump really is. The pathological lying of Trump, the taking credit for President Obama's successes (and that includes the U.S. economy that is still operating on the last FY budget of President Obama since Trump does not have his own budget passed yet), the exploding of both our National Debt and the deficit the Obama team had paid down from the GOP's 2001-2008 10.6% of GDP to 5.2% of GDP by 2012 and down even more by the end of President Obama's miracles-working jobs-creating second term.

RUSSIA committed ACTS OF WAR against the United States---and Donald Trump, Ivanka Trump, Jared Kushner, and the Trump campaign as well as members of his own administration solicited this help---Donald Trump doing so on national television! If you value America over other nations, you too would be "against Mr. Trump"!

its all a show, they secretly are for trump

Veteran ABC news anchor Sam Donaldson on Friday called out White House Press Secretary Sarah Huckabee Sanders’ well-documented history of lying as he appeared to suggest she deserved a “lifetime achievement Oscar” for spreading false and misleading information.

“Look, I’ve had the pleasure of working with almost every press secretary beginning with Pierre Salinger of John F. Kennedy’s administration and, except for Ron Ziegler who lied for Richard Nixon, I’ve never seen anything like this with Sarah Sanders,” Donaldson told CNN host Anderson Cooper.

Donaldson explained, however, how Ziegler lied only about matters related to the Watergate scandal but “would often be truthful” on other issues.

Sanders “simply lies about everything” on behalf of President Donald Trump’s administration, Donaldson claimed. “Not just one thing.”

I doubt that is accurate ma'am. You seem like such a nice old lady. I guarantee you 100% of the time 99% of us make our own fate. We have no argument. It was me you saw break in that liquor store ma'am.