Wire reporting: (AP, via ABC News)

Most of the United States will set clocks back one hour at 2 a.m. local time Sunday, ending daylight saving time, as a House-passed bill to make that time year-round remains stalled in the Senate^1,3.

The House approved the Sunshine Protection Act in July by a 308-17 vote, with 193 Republicans, 114 Democrats and one independent in favor, according to States Newsroom reporting carried by Colorado Newsline and other outlets^3,5.

The Associated Press, in copy carried by ABC News and other stations, reported Thursday that the Senate is unlikely to act on the measure before the end of the year^1,2.

President Donald Trump has called for permanent daylight saving time and criticized Sen. Tom Cotton, R-Ark., including by posting Cotton's cellphone number, according to both the AP account and States Newsroom^1,3.

Cotton said past Congresses enacted year-round daylight saving time and later repealed it after late winter sunrises³. Sen. Mike Rounds, R-S.D., said the change would send children to school in the dark, the AP reported^1,16.

Sen. Todd Young, R-Ind., called the House bill a non-starter for Senate Republican leaders, and Sen. Bernie Moreno, R-Ohio, said it would not pass soon, according to the AP^1,2.

Supporters include Sen. Rick Scott, R-Fla., who as governor signed a state law that would keep Florida on daylight saving time if Congress allowed it, and Sen. Ed Markey, D-Mass., who has backed ending twice-yearly clock changes^1,16. Sen. Patty Murray, D-Wash., said her state wants permanent daylight saving time because winter evenings go dark before 4 p.m.^3,15.

An AP-NORC poll last year found 12 percent of adults favored the current twice-yearly system, while States Newsroom cited the same poll as showing 56 percent preferred year-round daylight saving time^1,3.

Congress tried year-round daylight saving time in the 1973-74 energy-crisis period and repealed it within months amid dark school commutes^1,3. The Uniform Time Act of 1966 set the nationwide twice-yearly change, later shifted to March and November³.

Senators are due back Nov. 9. States Newsroom reported 22 remaining Senate session days this year, a Dec. 11 government-funding deadline, and a 60-vote threshold if the bill reaches the floor^3,15. Majority Leader John Thune, R-S.D., has not taken a public position on the current House bill; he has voted against similar measures and told Politico geography often drives senators' views^1,3.

Whether the Senate will schedule a vote after the Nov. 3 election is unknown. Absent action, clocks are expected to spring forward again on March 8, 2027³.