Democrats are up in Michigan, Texas, Kansas, Maine and Ohio, have an edge in Alaska and are effectively tied with Republicans in Iowa, new Times/Siena polls found.

In the last week before Tuesday’s midterms, the field of competitive races expanded and shifted even more in Democrats’ favor.

Michigan Democrat Abdul El-Sayed’s former opponent in the U.S. Senate primary, Haley Stevens, has stunned party officials by endorsing Republican Mike Rogers.