It's a smaller field of candidates going into Tuesday's presidential primaries in West Virginia and Nebraska.

There's only one Republican - businessman-turned-politician Donald Trump - still in the race. There are two Democrats - former Secretary of State Hillary Clinton and Vermont Senator Bernie Sanders - though Clinton has a seemingly insurmountable lead in delegates.

Nebraska's primary is only for Republicans; Democrats in the state held their caucus March 5 opting to give 15 pledged delegates to Sanders.

There are 36 Republican delegates in the state with the statewide winner receiving all of them.

Both Republicans and Democrats in West Virginia will be going to the polls on May 10. Thirty-four Republican delegates and 37 Democratic ones are up for grabs. Among Democrats, 29 will be divided among the two candidates based on the percentage of votes they receive in the primary. Eight are so-called super delegates who are not bound to any candidate.

Republicans will award 22 at-large delegates, nine delegates based on the winner of the state's three Congressional districts and three Republican National Committee unpledged delegates.

Clinton enters Tuesday's contests with 2,228 delegates, 155 short of the number needed to secure the nomination. Sanders has 1,454 delegates.

Trump has 1,068 delegates, 169 short of the 1,237 required for the Republican nomination. Assuming he takes all of Nebraska and West Virginia's delegates, his number will go to 1138, 99 short of the nomination threshold. There are 28 Republican delegates available in May 17's Oregon primary and 44 up for grabs in the Washington primary on May 24. Those numbers won't be enough to push Trump over the edge, meaning it will be the June 7 primaries in California, Montana, New Jersey, New Mexico and South Dakota that gives him the official nomination.

Polling in West Virginia shows Sanders edging Clinton 45 percent to 37 percent. Even before Texas Sen. Ted Cruz and Ohio Gov. John Kasich exited the race last week, Trump had a strong lead in the state, outpolling Cruz and Kasich 61 percent to 22 and 14 percent respectively.

Here is the remainder of the primary schedule:

Tuesday, May 17

Kentucky Democratic primary - 61 delegates

Oregon primary - 28 Republican delegates, 72 Democratic, delegates awarded proportionally

Tuesday, May 24

Washington Republican primary - 44 delegates, delegates awarded proportionally

Saturday, June 4

Virgin Island Democratic caucus - 12 delegates

Sunday, June 5

Puerto Rico Democratic caucus - 67 delegates

Tuesday, June 7

California - 172 Republican delegates, 546 Democratic, delegates awarded proportionally

Montana - 27 Republican delegates, 27 Democratic, winner-take-all

New Jersey - 51 Republican delegates, 142 Democratic, winner-take-all

New Mexico - 24 Republican delegates, 43 Democratic delegates, delegates awarded proportionately

North Dakota Democratic caucus - 23 delegates

South Dakota - 29 Republican delegates, 25 Democratic, winner-take-all

Tuesday, June 14

District of Columbia Democratic caucus - 46 delegates