This is the 15122nd most frequent Russian word.
политическим
"Политическим" means "political" in English.
In this sentence, 'политическим' is an adjective in dative plural, describing the noun 'изменениям' (changes) as pertaining to politics.
Он стремится к политическим изменениям.
He strives for political changes.
Here, 'политическим' modifies 'партиям' (parties), denoting parties involved in politics in dative plural form.
Политическим партиям необходимо учитывать мнение народа.
Political parties need to consider the opinion of the people.
In this example, 'политическим' relates to 'взглядам' (views), referring to ideas related to politics, in dative plural form.