Speaking on a Sunday talk show, Eric Cantor, the party's No. 2 leader in the House, takes a hard line on extending the cuts, which are due to expire at the end of the year. His comments may signal a collision course with the president.In another ominous sign of new political gridlock developing in Washington, House Republican leaders Sunday took a hard line on compromising with President Obama on extending tax cuts that are due to expire at the end of this year.