What exactly were her political views? There's stuff in her books in would be considered incredibly racist and anti-Semitic today, but that isn't really indicative of any specific political outlook.
From a list of political/religious views of famous people:
Conservative of the Old Order"Depending on who you ask, Christie either had no “coherent political position,” was “actually fairly liberal,” or her novels are
thinly veiled propaganda for Burkean conservatism. I’m partial to that last view, but feel free to argue with me in the comments.
Johann Hari argues in this essay that Christie believed
morality should be enforced on an individual level, not mandated by the state. She preferred the old order and was suspicious of change on a grand level as that related to a Nazi takeover of Europe or feminism. In the 1960s, when asked her views on women in the workplace, she said,
[It is] the foolishness of women in relinquishing their position of privilege obtained after many centuries of civilization. Primitive women toil incessantly. We seem determined to return to that state voluntarily.
As that quote betrays, her old order was based on class divisions of which she was the benefactor. It also informed the racism and antisemitism that make some of her passages unpalatable today.
Her worldview was from another time and place, one that no longer gets invited to the main stage of the political arena. So even though her books have long outlasted Christie herself, her world order is long gone."