Vance visits Tuesday with Representative Zach Nunn, while Cruz speaks Friday to the Iowa Faith & Freedom Coalition, as Republicans defend slim Senate and razor-thin House majorities.
The Iowa trips aid 2026 midterm candidates in a battleground state with competitive House, Senate and governor's races, while also giving both men early exposure ahead of a possible 2028 White House contest.
Cruz said he has no 2028 announcement, and Vance calls such talk premature, though both are seen as potential successors to term-limited President Donald Trump after the midterms.
How will the costly Iran war and its economic consequences shape the platforms of aspiring 2028 candidates?