Get more FiveThirtyEight
- Terms of Use
- Privacy Policy
- Your California Privacy Rights
- Children's Online Privacy Policy
- Interest-Based Ads
© 2018 ABC News Internet Ventures. All rights reserved.
Chance the Democrat wins (44.4%)
Chance the Republican wins (55.6%)
We'll be updating our forecasts every time new data is available, every day through Nov. 6.
The Classic version of our model projects a race’s outcome by taking a weighted average of polls of a district (if available), polls of similar districts (CANTOR) and non-polling factors (fundamentals). It is then reverted toward a mean based on long-term trends in midterms and presidential approval ratings.
R+0.9
Adjusted polls
R+1.9
CANTOR
R+0.5
Fundamentals
D+2.6
Experts
R+0.9
Lite
R+0.9
Classic
D+0.3
Deluxe
<0.1
<0.1
Historical adjustment
Key
More weight
Less
We've collected nine polls for the New Mexico 2nd. We’re adjusting poll results in three ways: Polls of registered voters or all adults are adjusted to a likely-voter basis; older polls are adjusted based on shifts in the generic congressional ballot since the poll was conducted; and polls are adjusted for house effects (the tendency for a firm’s polls to lean toward Democrats or Republicans). Polls with larger sample sizes and those conducted by higher-quality polling agencies are given more weight, as are more recent polls.
Adjustments | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
dates | pollster | sample | weight | Small | Herrell | margin | likely voter | Time-line | House effects | Adjusted margin | |
Oct. 26-Nov. 1 10/26-11/1 | Research & Polling, Inc. | 413 | LV | 1.41 | 45% | 46% | R+1.0 | — | <0.1 | 0.2 | R+1.1 |
Oct. 29 10/29 | Carroll Strategies | 338 | LV | 0.94 | 42% | 47% | R+5.0 | — | <0.1 | 1.4 | R+3.6 |
Oct. 24-26 10/24-26 | Emerson College | 278 | LV | 0.75 | 47% | 47% | D+0.4 | — | <0.1 | 0.6 | D+1.0 |
Oct. 19-23 10/19-23 | Siena College/New York Times | 522 | LV | 1.11 | 44% | 45% | R+0.1 | — | <0.1 | 0.3 | R+0.3 |
Sep. 30-Oct. 2 9/30-10/2 | Tarrance Group R | 400 | LV | 0.23 | 45% | 49% | R+4.0 | — | <0.1 | 4.6 | D+0.6 |
Sep. 13-18 9/13-18 | Siena College/New York Times | 503 | LV | 0.04 | 46% | 45% | D+0.7 | — | 0.1 | 0.3 | D+0.3 |
Sep. 7-13 9/7-13 | Research & Polling, Inc. | 405 | LV | 0.01 | 41% | 48% | R+7.0 | — | 0.2 | 0.2 | R+7.3 |
Jun. 15-16 6/15-16 | Carroll Strategies | 334 | LV | 0.00 | 35% | 49% | R+13.8 | — | 1.0 | 1.4 | R+11.4 |
Jun. 6-11 6/6-11 | DCCC Targeting Team D | 456 | RV | 0.00 | 43% | 45% | R+2.0 | 0.2 | 1.0 | 2.9 | R+4.1 |
Key
A = adults
RV = Registered voters
V = voters
LV = likely voters
= partisan poll
Our district similarity scores are based on demographic, geographic and political characteristics; if two districts have a score of 100, it means they are perfectly identical. These scores inform a system we use — CANTOR, or Congressional Algorithm using Neighboring Typologies to Optimize Regression — to infer what polling would say in unpolled or lightly polled districts, given what it says in similar districts.
Sim. score | Polling avg. | ||
---|---|---|---|
AZ-1 | 62 | D+4.2 | |
CA-8 | 52 | — | |
NM-3 | 52 | D+22.1 | |
NV-4 | 51 | D+3.6 | |
CO-3 | 48 | R+9.0 | |
CA-36 | 46 | — | |
CA-10 | 45 | D+2.1 | |
TX-27 | 44 | — | |
CA-22 | 43 | R+9.6 | |
TX-23 | 43 | R+16.1 |
The Classic and Deluxe versions of our model use several non-polling factors to forecast the vote share margin in each district.
Factor | Impact | Explanation |
---|---|---|
District partisanship | 9.0 | NM-2 is 10.8 percentage points more Republican-leaning than the country overall, based on how it has voted in recent presidential and state legislative elections. It voted for Trump in 2016 and Romney in 2012. |
Previous incumbent's margin in last election | 1.6 | A Republican won by 25.5 percentage points in this district in 2016. Previous district results are not strongly predictive in races without incumbents. |
Generic ballot | 8.6 | Democrats lead by an average of 8.6 percentage points in polls of the generic congressional ballot. |
Fundraising | 4.0 | As of Oct. 17, Xochitl Torres Small had raised $3,098,000 in individual contributions (76% of all such contributions to the major-party candidates); Yvette Herrell had raised $998,000 (24%). |
Candidate experience | 2.6 | Herrell has held elected office before but Small hasn't. |
Scandals | 0.0 | Neither candidate is involved in a scandal. |
Total | R+0.5 |
The Deluxe version of our model calculates an implied margin for each race based on expert race ratings from The Cook Political Report, Inside Elections and Sabato's Crystal Ball; it then adjusts that margin toward its estimate of the national political environment.
Equivalent Margin | |||
---|---|---|---|
Expert | Rating | Raw | Adjusted |
Cook Political Report | EVEN | D+0.6 | |
Inside Elections | EVEN | D+0.9 | |
Sabato's Crystal Ball | D+6.7 | D+6.3 | |
Average | D+2.2 | D+2.6 |
Nate Silver explains the methodology behind our 2018 midterms forecast. Read more …
Comments