Obama v Romney: US election poll tracker

The race to the White House is a close call with the two candidates neck-and-neck in the days before the election. Use our polltracker to follow the changing support for Democratic incumbent Barack Obama and his Republican rival Mitt Romney.

The BBC poll of polls uses the same methodology as the London School of Economics, known as the median smoothing method.

Looking at the five most recent polls it takes the middle value for each candidate, ie, the value which falls between two figures that are higher and two figures that are lower.

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Polls compiled in the poll tracker
Poll	Obama	Romney	Date	Margin of Error	Sampling Method
Pew Research	50	47	4 Nov	+/-2.2	2709 LV
Gallup	49	50	4 Nov	+/-2	2700 LV
ABC News/Wash Pos	50	47	4 Nov	+/-2.5	2345 LV
CNN/Opinion Research	49	49	4 Nov	+/-3.5	963 LV
Pew Research	50	47	3 Nov	+/-2.2	2709 LV
ABC News/Wash Post	49	48	3 Nov	+/-2.5	2069 LV
ABC News/Wash Post	49	49	30 Oct	+/-3.0	1288 LV
ABC News/Wash Post	49	48	29 Oct	+/-3.5	1271 LV
ABC News/Wash Post	49	49	28 Oct	+/-3.5	1259 LV
Gallup	46	51	28 Oct	+/-2	2700 LV
Pew Research	47	47	28 Oct	+/-2.9	1495 LV
Gallup	46	50	27 Oct	+/-2	2700 LV
ABC News/Wash Post	48	49	27 Oct	+/-3	1382 LV
Gallup	46	50	27 Oct	+/-2	2700 LV
Reuters/Ipsos	47	46	26 Oct	+/- 2.6	1141 LV
ABC News/Wash Post	47	50	26 Oct	+/-3	1382 LV
ABC News/Wash Post	48	49	25 Oct	+/-3	1382 LV
Gallup	46	51	25 Oct	+/-2	2700 LV
ABC News/Wash Post	48	49	23 Oct	+/-3	1382 LV
Gallup	47	50	23 Oct	+/-2	2700 LV
Reuters/Ipsos	47	44	17 Oct	+/- 3.3	1141 LV
Gallup	46	50	16 Oct	+/- 3	2723 LV
Reuters/Ipsos	46	43	16 Oct	+/- 2.6	1846 LV
Reuters/Ipsos	47	45	15 Oct	+/- 2.6	1864 LV
Reuters/Ipsos	46	45	14 Oct	+/- 2.5	1793 LV
ABC News/ Wash Post	49	46	13 Oct	+/- 3.5	923LV
Gallup	49	46	8 Oct	+/-2	3050 RV
Pew Research	45	49	7 Oct	+/-3.4	1112 LV
CNN/Opinion Research	50	47	30 Sept	+/-3.5	783 LV
ABC News/Wash Post	49	47	29 Sept	+/-4	813 LV
Gallup	50	44	28 Sept	+/-2	3050 RV
Gallup	47	47	19 Sept	+/-2	3050 RV
Pew Research	51	43	16 Sept	+/-2.4	2268 LV
CBS News/NY Times	49	46	12 Sept	+/-4	1162 LV
Reuters/Ipsos	48	45	10 Sept	+/-3.4	873 LV
ABC News/Wash Post	49	48	9 Sept	+/-4.5	710 LV
CNN/Opinion Research	52	46	9 Sept	+/-3.5	709 LV
Gallup	49	44	9 Sep	+/-2	3050 RV
CNN/Opinion Research	48	48	3 Sep	+/-3.5	735 LV
Gallup	47	46	1 Sept	+/-2	3050 RV
ABC News/Wash Post	46	47	25 Aug	+/-4	857 RV
CNN/Opinion Research	49	47	23 Aug	+/-3.5	719 LV
Gallup	45	47	21 Aug	+/-2	3050 RV
Gallup	46	46	11 Aug	+/-2	3050 RV
Gallup	47	45	1 Aug	+/-2	3050 RV
Pew Research	51	41	26 July	+/-3.2	1956 RV
Gallup	46	46	25 July	+/-2	3050 RV
CBS News/NY Times	46	47	16 July	+/-3	942 RV
Gallup	47	44	11 July	+/-2	3050 RV
Reuters/Ipsos	49	43	9 July	+/-3.4	885 RV
Pew Research	50	43	9 July	+/-2.3	2373 RV
ABC News/Wash Post	47	47	8 July	+/-4	1003 RV
CNN/Opinion Research	49	46	1 July	+/-2.5	1390 RV
Gallup	48	43	28 Jun	+/-2	3050 RV
Pew Research	50	46	17 Jun	+/-2.9	1563 RV
Gallup	45	46	14 Jun	+/-2	3050 RV
Reuters/Ipsos	45	44	11 Jun	+/-3.4	848 RV
Gallup	46	45	8 Jun	+/-2	3050 RV
Pew Research	49	42	3 Jun	+/-2.3	2388 RV
CNN/Opinion Research	49	46	31 May	+/-3.5	895 RV
Gallup	47	44	30 May	+/-2	3050 RV
ABC News/Wash Post	49	46	20 May	+/-4	874 RV
Gallup	45	46	17 May	+/-2	3050 RV
CBS News/NY Times	43	46	13 May	+/-4	562 RV
Gallup	44	47	9 May	+/-2	3000 RV
Reuters/Ipsos	49	42	7 May	+/-3.2	959 RV

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The data was collated by polling resource website Real Clear Politics. RV indicates those polled were registered voters. LV indicates a sample of likely voters.