

In the US, it’s probably because most of the mainstream media is owned by conservatives.
Examples:
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Rupert Murdoch owns Fox News, NY Post, and the Wall Street Journal.
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CNN and CBS News (as weak as a number of other channels) are run by the Ellison family. There has been talk of making them sell CNN to someone else, but it hasn’t happened yet.
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The Washington Post is owned by Amazon mogul, Jeff Bezos.
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The Hill and NewsNation are owned by Nextstar (who also own the largest number of broadcast tv stations). Founded and run by Perry Sook.

Not the Texas conservatives I know. They have told me they are voting straight ® down the ballot. They don’t care (see also Ted Cruz, Donald Trump).