is for ABRAMS, STACEY
It could be a day of firsts in the mid-term elections on 6 November: Abrams could become the first black female governor of a US state, in Georgia.
is for BERNIE SANDERS
He's hoping to keep his Senate seat in Vermont (he's one of only two independent senators) and pro-Bernie progressives hope to win big elsewhere.
is for CONGRESS
The big prize. Republicans control both houses (the House of Representatives and the Senate) but face a battle to keep their grip on 6 November.
is for DONALD TRUMP
His name isn't on the ballot, but it might as well be. Will Republicans who back him win bigly? Or will Democrats who openly oppose him thrive?
is for ELECTION
What happens in the mid-terms will shape the 2020 presidential campaign. Who'll have to regroup? Who'll have the wind in their sails?
is for FLIP
Both parties will hope to claim their rivals' territory. For the Democrats to defeat Republicans, they have to flip 23 seats in the House and at least two in the Senate.
is for GOVERNORS
It's not just members of Congress that people are voting for this November – they'll also pick governors in 36 of the 50 states.
is for HOUSE
There are 435 seats in the House of Representatives up for grabs - Republicans have controlled it since 2010.
is for IMPEACHMENT
If the Democrats win the House, they could vote to impeach President Trump. There'd then be a trial in the Senate.
is for JARED POLIS
He's the Democratic candidate for governor in Colorado - and could be the country's first openly gay governor.
is for KAVANAUGH, BRETT
How much of a factor will the row over Trump's Supreme Court choice play? His selection drew a fierce reaction from Democrats, but rallied Republicans.
is for LAME DUCK
This is the part Trump would play if Democrats take over Congress - unable to push through his policies (like Obama from 2014-16).
is for MUELLER, ROBERT
The man investigating the 2016 Trump campaign. Expect him to come under more pressure if Republicans strengthen their grip on Congress.
is for NANCY PELOSI
If the Democrats win the House, she'll probably become its Speaker again (it's a powerful role - they choose the members and chairs of committees, that can launch investigations).
is for O'ROURKE, BETO
The Democrat running a close contest for a Senate seat in Texas against Ted Cruz, the former presidential candidate. It's one race worth watching.
is for POLLS
Pollsters took a beating in 2016 after writing off Trump. Will their (varied) predictions this year be any more accurate?
is for QUORUM
The minimum number of members who need to be present so they can go about their business. In the House, this is 218 members (out of 435), and in the Senate, it's 51 (out of 100).
is for RASHIDA TLAIB
…who's running unopposed for the House in Michigan and will be the first Muslim congresswoman. Former refugee Ilhan Omar may be the second, in Minnesota.
is for SENATE
Of the 100 seats in the Senate, 35 are being contested. The chances of the Republicans losing control of the Senate are slim, because only nine of their seats are up for grabs.
is for TURNOUT
About 60% of Americans turn out to vote for president, but only 40% normally vote in the mid-terms. It was only 35.9% last time, in 2014 - but could well be higher this year.
is for UNEMPLOYMENT
It's continued to fall under President Trump and is now about 3.7% - this is a big factor in his favour as voters decide who to back.
is for VICTORY SPEECH
Whose turn will it be to make the great inspirational speech of the evening? (Or to blunder by not preparing properly?)
is for WOMEN
There are more women running for governorships and seats in Congress than ever before. Tennessee could get its first female senator: Republican Marsha Blackburn.
MARKS THE SPOT
Put down a cross or blacken the oval - just remember to check how to fill in your ballot paper!
is for YOUTH VOTE
Young people don't turn out in big numbers at the mid-terms, where voters tend to be older and white (and Republican). This year might be different.
is for ZURCHER, ANTHONY
Our man in the know - you can follow all his expert analysis in the build-up to, and fallout from, the mid-terms.