回答如下：
根据句子结构，本句是简单句; 根据内容，本句是肯定的陈述句。其句子结构分析如下：
主语部分：A primary(定语) tactic (主语) of the Trump campaign and conservative groups (of 短语作定语，修饰主语tactic; Trump 和conservative均作定语; campaign和groups作介词of 的宾语。)
谓语部分：has been to use lawsuits and other maneuvers to try to prevent states from certifying their results( has been to use lawsuits and other maneuvers是系表结构作合成谓语，其中has been是系动词be 的现在完成时，to use lawsuits and other maneuvers是不定式短语作表语，other作定语，lawsuits和maneuvers作动词use的宾语; to try to prevent states from certifying their results是不定式短语作目的状语，其中to prevent states from certifying their results是不定式短语作动词try的宾语，states作prevent的宾语，from certifying their results是介词短语作宾补，certifying their results是动名词短语作介词from的宾语，their是定语，results是动名词certifying的宾语。 )。追问
根据句子结构，本句是简单句; 根据内容，本句是肯定的陈述句。其句子结构分析如下：
主语部分：A primary(定语) tactic (主语) of the Trump campaign and conservative groups (of 短语作定语，修饰主语tactic; Trump 和conservative均作定语; campaign和groups作介词of 的宾语。)
谓语部分：has been to use lawsuits and other maneuvers to try to prevent states from certifying their results( has been to use lawsuits and other maneuvers是系表结构作合成谓语，其中has been是系动词be 的现在完成时，to use lawsuits and other maneuvers是不定式短语作表语，other作定语，lawsuits和maneuvers作动词use的宾语; to try to prevent states from certifying their results是不定式短语作目的状语，其中to prevent states from certifying their results是不定式短语作动词try的宾语，states作prevent的宾语，from certifying their results是介词短语作宾补，certifying their results是动名词短语作介词from的宾语，their是定语，results是动名词certifying的宾语。 )。追问
回答的非常清晰，非常感谢你！
追答My pleasure!
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