Yah Reagan was considered the odds on favorite for the Republican nomination and in fact in many polls was the only Republican polls against Carter . He was even beating Ford by double digits in most polls and Bush was polling horribly until he won in Iowa :
https://en.m.wikipedia.org/wiki/1980_Republican_Party_presidential_primariesSee the polling part and there is also this quote
Ronald Reagan, who had narrowly lost the 1976 Republican nomination to President Gerald Ford, was the early odds-on favorite to win the nomination in 1980. He was so far ahead in the polls that campaign director John Sears decided on an "above the fray" strategy. He did not attend many of the multi-candidate forums and straw polls in the summer and fall of 1979