1. Association
Association as a literary or rhetorical device is defined as a connection made between ideas. The quote by Lincoln associates the state of the Union with the biblical statement of Jesus about standing with good or with evil, as well as the picture of membes of a household at odds with one another.
2. bias in favor of Senator Hartford
Senator Hartford's introduction praises her as a "conservative leader," whereas Senator Williams is identified only by a negative factor, an investigation against him. There is clear bias favoring Senator Hartford.
3. moderate to extreme views
The choices for this question could show some bias themselves! Essentially, the Republican Party tends to be the more conservative party in American politics. But it has some moderate members and, on the far right, some extreme members. So "moderate to extreme" would seem to best express the range of views seen in the Republican Party.
4. Democratic Party
The Democrats are typically seen as "liberal," whereas the Republicans are conservative and the Green Party radical. The Libertarian party has some tendencies that align with liberal views and some with conservative, depending on the issue. Libertarians tend to believe in giving the greatest amount of freedom possible, so they may be on the free market side of economic issues (like many Republicans) but also may favor legalizing marijuana (like many liberals).
5. Parties
The United States has tended to be primarily a two-party system through most of its history.