Rep. Shelley Berkley, D-Nev., is likely to be the only member of Nevada's congressional delegation to make an endorsement at this point in the campaign.
Berkley this week endorsed Hillary Clinton in the presidential race.
Senate Majority Leader Harry Reid, D-Nev., has said in the past he doesn't intend to make an early endorsement. One reason is his position in the party's national leadership.
Likewise, John Ensign's press secretary said the senator will not be making an endorsement at this point. Ensign is in charge of the GOP's U.S. Senate campaign efforts this coming year.
And Dean Heller, the Republican freshman who won the seat vacated by Jim Gibbons, also has declined to choose one of the GOP presidential candidates at this point in the race.
The remaining member of Nevada's delegation, Rep. Jon Porter, R-Nev., was not available but also has indicated a reluctance to commit to a nominee at this stage of the campaign.
The attention has focused on Nevada now that the New Hampshire primary is over with Clinton winning there and Barack Obama taking the Iowa caucuses.
Nevada's caucuses for both parties are Jan. 19.