It's not just "DNC and US intelligence." Wikileaks tried to influence the 2017 election in France among other examples. See
https://fr.wikipedia.org/wiki/MacronLeaks. This partially backfired when the dump of e-mails they published was found to contain russian-language messages.
That Wikileaks systematically favors the russian government, and never does anything contrary to the interests of the russian government, strongly suggests they are an asset of russia.