Everything was possible, yesterday.

The most famous was none of them -- all being outgloried by a movie-star wife.

One had been a professional basketball player, but that stopped counting for much as soon as the winning vote was cast.

One was youth, at 26.

One was a very gray freshman at 68.

All were winners, even -- or especially -- the doughter of Alf Landon, whom the country forgot about in horders in 1936.

There were 77 new members in the House, 20 in the Senate of the 96th Congress, and yesterday was the day they got to eat the bacon they'd brought home on election day. They toasted temselves in benisons of song from a black quintet; in Dr. Pepper, in cheers raised with the last victory speeches of a long, long year now over.

All, of course, will spend less, tax lighter and sweep harder, as new brooms should do, and at the great susurrus of receptions all over the Hill, most still believed it -- except, of course, for the Old and Great Ones who glided in to offer welcomes, and remember the day in their own lives when everything was possible. Henry Allen

The dozen or so people who stopped by to congratulate Rep. Edward Stack (D-Fia.) before the swearing-in ceremony weren't very hungry. As the afternoon wore on, the five staff members in the office nibbled at the piles of Danish on the congressman's desk and finally cleared them away.

"There was no party scheduled for today," said Mary Lou Lucas, adminstrative aide for Stack, who at 68 holds the honor of being the oldest freshman in the "Class of '78," "He didn't want to inconvenciene people from his district by having a party. Besides, who would want to leave Florida this time of year?"