With both the Republican and Democratic presidential nominees still undecided, Connecticut voters have an opportunity to participate in a meaningful way in the primary election on Tuesday, April 26.

All three of Wilton’s polling places will be open from 6 a.m. to 8 p.m. District 1 votes at the Clune Center at Wilton High School, 395 Danbury Road; District 2 votes in the main gym at Cider Mill School, 240 School Road; and District 3 votes in the gym at Middlebrook School, 131 School Road. School will be in session that day.

On the Democratic line, candidates are Roque “Rocky” De La Fuente, who petitioned onto the ballot, Hillary Clinton, Bernie Sanders, and Uncommitted.

Republican candidates are Ted Cruz, Ben Carson, Donald J. Trump, John R. Kasich, and Uncommitted. Carson did not withdraw his candidacy by the state deadline.

Only registered Republicans or Democrats may vote in their party’s primary. New and unaffiliated voters have until noon on Monday, April 25, to enroll in a party. Today, April 21, is the deadline to submit a mail-in voter registration application or use Connecticut’s online system to change affiliation. Unlike in a general election, there is no Election Day registration for a primary.

According to Secretary of the State Denise Merrill, “people are registering to vote at a record-setting pace and switching their status from unaffiliated voters in order to participate in the presidential primary.”

Since January, almost 22,000 unaffiliated voters in Connecticut have switched to a major party. According to information released on April 15, 13,722 people switched from unaffiliated voters to the Democratic Party and 8,232 people switched from unaffiliated to the Republican Party.

The opportunity to change from one major party to another passed on Jan. 26. Not surprisingly, some Wilton voters made a move, with 18 times as many major party voters changing their affiliation over the course of the monthlong period leading up to Jan. 26, 2016, than over the same period in non-election 2015.

A total of 54 major-party Wilton voters changed their affiliation between Dec. 26, 2015, and Jan. 26, 2016 — 28 Democrats and 26 Republicans.

From Dec. 26, 2014, through Jan. 26, 2015, however, only three did, all Republican.

This does not imply, for the period, that those voters re-registered with the other major party — it simply shows that 54 major-party voters altered their affiliations.

Connecticut expects to have 28 delegates at the Republican National Convention. Fifteen of these are district-level delegates, three from each congressional district.

Democrats will have 71 Connecticut delegates at their convention, 55 of whom are pledged to presidential contenders based on the results of the voting in the primary.

You can have real input on who they ultimately vote for if you vote on Tuesday.