($22 Stars) 2 hands; Are these pushes?

[Mike MacIntosh]

Without a read, would you push in these spots? Please explain why or why not.

PokerStars Tournament, Big Blind is t100 (6 handed) Converter on pregopoker.com

UTG (t2630)
UTG+1 (t1485)
CO (t1280)
Hero (t935)
SB (t4490)
BB (t2680)

Preflop: Hero is in Button with K[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/club.gif[/img]
<font color="gray">UTG folds</font>, <font color="gray">UTG+1 folds</font>, <font color="gray">CO folds</font>, <font color="gray">Hero ???

PokerStars Tournament, Big Blind is t150 (4 handed) Converter on pregopoker.com

Hero (t975)
Button (t1625)
SB (t2480)
BB (t8420)

Preflop: Hero is in CO with K[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/heart.gif[/img]
<font color="red">Hero ???