def find_longest_repeat(seq):
    """Find the longest repeat in a string, 
    then return the length and the character in a tuple.
    """
    maximum = 0
    count = 0
    current = ''
    letter = ''

    for nt in seq:
        if nt == current:
            count += 1
        else:
            count = 1
            current = nt

        if count > maximum:
            letter = nt
        maximum = max(count, maximum)

    return (maximum, letter)