Because of the basic constitutional guarantees that allow citizens to express their views and compel government leaders to take those views into account, it is both possible and essential for political leaders and policy advocates to try to .

Engage citizens for their opinions

Explanation:

Freedom of expression is one of the essential rights that local people have over the government where they are open to express their views about the policies set by gvernement or the performance of the governement with respect to its agenda. It can be done via social media or digital media. Hence it is extremely vital that governement bodies should keep the citizens engaged so that they dont feel isolated and hae good believe on the gvernment

shape and mobilize public opinion on behalf of their causes

Explanation:

Constitutional guarantees can be described or explained as  legal measures that protect basic or fundamental rights of the citizens.

some  of the known basic or fundamental rights of the citizen of a country as mandated by law are  

* the rights are freedom of speech,

* the right to a fair and public trial,

* the right to due process,

*the right to vote freely,

* the right to worship freely.

In this case, since there are basic constitutional guarantees for the citizens to express their views, [ known as freedom of speech] and compel the leaders to consider those views, therefore the leaders will try to work on the views and pick the best out of them.

what is the tax base for the sales tax?

it should be (usually ) 6%