India, Nov. 2 -- Americans vote on Tuesday in midterm elections that will decide which party controls the US Congress for the last two years of President Donald Trump's second term, and with it how much of his agenda he can still push through.

The vote, analysts say, is also a test of Trump's popularity during the US war with Iran, which has driven up fuel prices and sparked a global crisis.

HT explains why the midterms are held, what they change for ordinary Americans and how they differ from India's parliamentary elections.

The midterms are held every four years, halfway through a president's term, in every state and territory on the same day. The presidency is not on the ballot, but both chambers of Congress are, along with state of...