At current rates, the Brazilian/Gamma (P1) And Indian/Delta (1.617.2) variants are (together) going to be over 50% of new cases by the 3rd of July (end of the next bi-weekly reporting period).
However, this report (COVID Data Tracker Weekly Review) is typically not published until several days or a week after the end of the reporting period. ( https://covid.cdc.gov/covid-data-tracker/#variant-proportions - toggle “NowCast” to “on” for the most recent time period)
So in July, we will really see if these variants are going to make much of a difference in the USA.
So far, not much impact noticeable at the level of US National totals.