U.S. President Donald Trump has attacked The Washington Post, owned by Amazon founder and CEO Jeff Bezos, alleging that the daily is being used against Congress for mounting pressure on politicians so that they do not look into the e-commerce giant’s alleged tax-monopoly.

Mr. Trump accused The Post of filing incorrect stories.

“Is fake news Washington Post being used as a lobbyist weapon against Congress to keep politicians from looking into Amazon no—tax monopoly?” he said in a series of tweets late last night.

“So many stories about me in the @washingtonpost are Fake News. They are as bad as ratings challenged @CNN. Lobbyist for Amazon and taxes?” Mr. Trump asked.

“The Amazon Washington Post fabricated the facts on my ending massive, dangerous and wasteful payments to Syrian rebels fighting Assad,” he said as he challenged The Post for writing a story on Syria, which he said is wrong.

In a lead story, The Post said that cooperation with Russia is becoming a central part of the Trump administration’s counter-Islamic State strategy in Syria.

U.S. military planners are counting on Moscow to try to prevent Syrian government forces and their allies on the ground from interfering in coalition-backed operations against the militants, the daily said.

However, according to the daily, some lawmakers and White House officials have expressed concern that the shortsighted strategy gives the long-term advantage in Syria to Russia, Iran and Assad, and ultimately leaves the door open for a vanquished Islamic State to re-establish itself.